diff options
author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2014-11-17 13:42:20 (GMT) |
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committer | Vinod Koul <vinod.koul@intel.com> | 2014-12-22 06:58:59 (GMT) |
commit | db08425ebd51f3b4c73b0698ca3b0173ebd106be (patch) | |
tree | 78508c09736c2a09349d94b42d52f7978cc12b82 /drivers/dma/k3dma.c | |
parent | 701c1edbb4dc895d018312a7e4e5f2c673bf155c (diff) | |
download | linux-db08425ebd51f3b4c73b0698ca3b0173ebd106be.tar.xz |
dmaengine: k3: Split device_control
Split the device_control callback of the Hisilicon K3 DMA driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/k3dma.c')
-rw-r--r-- | drivers/dma/k3dma.c | 197 |
1 files changed, 107 insertions, 90 deletions
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index a1de14a..49be7f6 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -441,7 +441,7 @@ static struct dma_async_tx_descriptor *k3_dma_prep_memcpy( num = 0; if (!c->ccfg) { - /* default is memtomem, without calling device_control */ + /* default is memtomem, without calling device_config */ c->ccfg = CX_CFG_SRCINCR | CX_CFG_DSTINCR | CX_CFG_EN; c->ccfg |= (0xf << 20) | (0xf << 24); /* burst = 16 */ c->ccfg |= (0x3 << 12) | (0x3 << 16); /* width = 64 bit */ @@ -523,112 +523,126 @@ static struct dma_async_tx_descriptor *k3_dma_prep_slave_sg( return vchan_tx_prep(&c->vc, &ds->vd, flags); } -static int k3_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int k3_dma_config(struct dma_chan *chan, + struct dma_slave_config *cfg) +{ + struct k3_dma_chan *c = to_k3_chan(chan); + u32 maxburst = 0, val = 0; + enum dma_slave_buswidth width = DMA_SLAVE_BUSWIDTH_UNDEFINED; + + if (cfg == NULL) + return -EINVAL; + c->dir = cfg->direction; + if (c->dir == DMA_DEV_TO_MEM) { + c->ccfg = CX_CFG_DSTINCR; + c->dev_addr = cfg->src_addr; + maxburst = cfg->src_maxburst; + width = cfg->src_addr_width; + } else if (c->dir == DMA_MEM_TO_DEV) { + c->ccfg = CX_CFG_SRCINCR; + c->dev_addr = cfg->dst_addr; + maxburst = cfg->dst_maxburst; + width = cfg->dst_addr_width; + } + switch (width) { + case DMA_SLAVE_BUSWIDTH_1_BYTE: + case DMA_SLAVE_BUSWIDTH_2_BYTES: + case DMA_SLAVE_BUSWIDTH_4_BYTES: + case DMA_SLAVE_BUSWIDTH_8_BYTES: + val = __ffs(width); + break; + default: + val = 3; + break; + } + c->ccfg |= (val << 12) | (val << 16); + + if ((maxburst == 0) || (maxburst > 16)) + val = 16; + else + val = maxburst - 1; + c->ccfg |= (val << 20) | (val << 24); + c->ccfg |= CX_CFG_MEM2PER | CX_CFG_EN; + + /* specific request line */ + c->ccfg |= c->vc.chan.chan_id << 4; + + return 0; +} + +static int k3_dma_terminate_all(struct dma_chan *chan) { struct k3_dma_chan *c = to_k3_chan(chan); struct k3_dma_dev *d = to_k3_dma(chan->device); - struct dma_slave_config *cfg = (void *)arg; struct k3_dma_phy *p = c->phy; unsigned long flags; - u32 maxburst = 0, val = 0; - enum dma_slave_buswidth width = DMA_SLAVE_BUSWIDTH_UNDEFINED; LIST_HEAD(head); - switch (cmd) { - case DMA_SLAVE_CONFIG: - if (cfg == NULL) - return -EINVAL; - c->dir = cfg->direction; - if (c->dir == DMA_DEV_TO_MEM) { - c->ccfg = CX_CFG_DSTINCR; - c->dev_addr = cfg->src_addr; - maxburst = cfg->src_maxburst; - width = cfg->src_addr_width; - } else if (c->dir == DMA_MEM_TO_DEV) { - c->ccfg = CX_CFG_SRCINCR; - c->dev_addr = cfg->dst_addr; - maxburst = cfg->dst_maxburst; - width = cfg->dst_addr_width; - } - switch (width) { - case DMA_SLAVE_BUSWIDTH_1_BYTE: - case DMA_SLAVE_BUSWIDTH_2_BYTES: - case DMA_SLAVE_BUSWIDTH_4_BYTES: - case DMA_SLAVE_BUSWIDTH_8_BYTES: - val = __ffs(width); - break; - default: - val = 3; - break; - } - c->ccfg |= (val << 12) | (val << 16); + dev_dbg(d->slave.dev, "vchan %p: terminate all\n", &c->vc); - if ((maxburst == 0) || (maxburst > 16)) - val = 16; - else - val = maxburst - 1; - c->ccfg |= (val << 20) | (val << 24); - c->ccfg |= CX_CFG_MEM2PER | CX_CFG_EN; + /* Prevent this channel being scheduled */ + spin_lock(&d->lock); + list_del_init(&c->node); + spin_unlock(&d->lock); - /* specific request line */ - c->ccfg |= c->vc.chan.chan_id << 4; - break; + /* Clear the tx descriptor lists */ + spin_lock_irqsave(&c->vc.lock, flags); + vchan_get_all_descriptors(&c->vc, &head); + if (p) { + /* vchan is assigned to a pchan - stop the channel */ + k3_dma_terminate_chan(p, d); + c->phy = NULL; + p->vchan = NULL; + p->ds_run = p->ds_done = NULL; + } + spin_unlock_irqrestore(&c->vc.lock, flags); + vchan_dma_desc_free_list(&c->vc, &head); - case DMA_TERMINATE_ALL: - dev_dbg(d->slave.dev, "vchan %p: terminate all\n", &c->vc); + return 0; +} - /* Prevent this channel being scheduled */ - spin_lock(&d->lock); - list_del_init(&c->node); - spin_unlock(&d->lock); +static int k3_dma_pause(struct dma_chan *chan) +{ + struct k3_dma_chan *c = to_k3_chan(chan); + struct k3_dma_dev *d = to_k3_dma(chan->device); + struct k3_dma_phy *p = c->phy; - /* Clear the tx descriptor lists */ - spin_lock_irqsave(&c->vc.lock, flags); - vchan_get_all_descriptors(&c->vc, &head); + dev_dbg(d->slave.dev, "vchan %p: pause\n", &c->vc); + if (c->status == DMA_IN_PROGRESS) { + c->status = DMA_PAUSED; if (p) { - /* vchan is assigned to a pchan - stop the channel */ - k3_dma_terminate_chan(p, d); - c->phy = NULL; - p->vchan = NULL; - p->ds_run = p->ds_done = NULL; + k3_dma_pause_dma(p, false); + } else { + spin_lock(&d->lock); + list_del_init(&c->node); + spin_unlock(&d->lock); } - spin_unlock_irqrestore(&c->vc.lock, flags); - vchan_dma_desc_free_list(&c->vc, &head); - break; + } - case DMA_PAUSE: - dev_dbg(d->slave.dev, "vchan %p: pause\n", &c->vc); - if (c->status == DMA_IN_PROGRESS) { - c->status = DMA_PAUSED; - if (p) { - k3_dma_pause_dma(p, false); - } else { - spin_lock(&d->lock); - list_del_init(&c->node); - spin_unlock(&d->lock); - } - } - break; + return 0; +} - case DMA_RESUME: - dev_dbg(d->slave.dev, "vchan %p: resume\n", &c->vc); - spin_lock_irqsave(&c->vc.lock, flags); - if (c->status == DMA_PAUSED) { - c->status = DMA_IN_PROGRESS; - if (p) { - k3_dma_pause_dma(p, true); - } else if (!list_empty(&c->vc.desc_issued)) { - spin_lock(&d->lock); - list_add_tail(&c->node, &d->chan_pending); - spin_unlock(&d->lock); - } +static int k3_dma_resume(struct dma_chan *chan) +{ + struct k3_dma_chan *c = to_k3_chan(chan); + struct k3_dma_dev *d = to_k3_dma(chan->device); + struct k3_dma_phy *p = c->phy; + unsigned long flags; + + dev_dbg(d->slave.dev, "vchan %p: resume\n", &c->vc); + spin_lock_irqsave(&c->vc.lock, flags); + if (c->status == DMA_PAUSED) { + c->status = DMA_IN_PROGRESS; + if (p) { + k3_dma_pause_dma(p, true); + } else if (!list_empty(&c->vc.desc_issued)) { + spin_lock(&d->lock); + list_add_tail(&c->node, &d->chan_pending); + spin_unlock(&d->lock); } - spin_unlock_irqrestore(&c->vc.lock, flags); - break; - default: - return -ENXIO; } + spin_unlock_irqrestore(&c->vc.lock, flags); + return 0; } @@ -720,7 +734,10 @@ static int k3_dma_probe(struct platform_device *op) d->slave.device_prep_dma_memcpy = k3_dma_prep_memcpy; d->slave.device_prep_slave_sg = k3_dma_prep_slave_sg; d->slave.device_issue_pending = k3_dma_issue_pending; - d->slave.device_control = k3_dma_control; + d->slave.device_config = k3_dma_config; + d->slave.device_pause = k3_dma_pause; + d->slave.device_resume = k3_dma_resume; + d->slave.device_terminate_all = k3_dma_terminate_all; d->slave.copy_align = DMA_ALIGN; /* init virtual channel */ |