The pl330 needs platform data for describing peripheral connections, but
some platforms may only support memory to memory dma channels. In this
case, we can probe for how many channels there are and don't need the
platform data.
As memcpy requests don't need channel private data to hold peripheral
info, allow private data to be NULL in this case.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Vinod Koul <vkoul@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
spinlock_t pool_lock;
/* Peripheral channels connected to this DMAC */
spinlock_t pool_lock;
/* Peripheral channels connected to this DMAC */
- struct dma_pl330_chan peripherals[0]; /* keep at end */
+ struct dma_pl330_chan *peripherals; /* keep at end */
};
struct dma_pl330_desc {
};
struct dma_pl330_desc {
desc->txd.cookie = 0;
async_tx_ack(&desc->txd);
desc->txd.cookie = 0;
async_tx_ack(&desc->txd);
- desc->req.rqtype = peri->rqtype;
- desc->req.peri = peri->peri_id;
+ if (peri) {
+ desc->req.rqtype = peri->rqtype;
+ desc->req.peri = peri->peri_id;
+ } else {
+ desc->req.rqtype = MEMTOMEM;
+ desc->req.peri = 0;
+ }
dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
struct pl330_info *pi;
int burst;
struct pl330_info *pi;
int burst;
- if (unlikely(!pch || !len || !peri))
+ if (unlikely(!pch || !len))
- if (peri->rqtype != MEMTOMEM)
+ if (peri && peri->rqtype != MEMTOMEM)
return NULL;
pi = &pch->dmac->pif;
return NULL;
pi = &pch->dmac->pif;
int i, burst_size;
dma_addr_t addr;
int i, burst_size;
dma_addr_t addr;
- if (unlikely(!pch || !sgl || !sg_len))
+ if (unlikely(!pch || !sgl || !sg_len || !peri))
return NULL;
/* Make sure the direction is consistent */
return NULL;
/* Make sure the direction is consistent */
struct dma_device *pd;
struct resource *res;
int i, ret, irq;
struct dma_device *pd;
struct resource *res;
int i, ret, irq;
pdat = adev->dev.platform_data;
pdat = adev->dev.platform_data;
- if (!pdat || !pdat->nr_valid_peri) {
- dev_err(&adev->dev, "platform data missing\n");
- return -ENODEV;
- }
-
/* Allocate a new DMAC and its Channels */
/* Allocate a new DMAC and its Channels */
- pdmac = kzalloc(pdat->nr_valid_peri * sizeof(*pch)
- + sizeof(*pdmac), GFP_KERNEL);
+ pdmac = kzalloc(sizeof(*pdmac), GFP_KERNEL);
if (!pdmac) {
dev_err(&adev->dev, "unable to allocate mem\n");
return -ENOMEM;
if (!pdmac) {
dev_err(&adev->dev, "unable to allocate mem\n");
return -ENOMEM;
pi = &pdmac->pif;
pi->dev = &adev->dev;
pi->pl330_data = NULL;
pi = &pdmac->pif;
pi->dev = &adev->dev;
pi->pl330_data = NULL;
- pi->mcbufsz = pdat->mcbuf_sz;
+ pi->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
res = &adev->res;
request_mem_region(res->start, resource_size(res), "dma-pl330");
res = &adev->res;
request_mem_region(res->start, resource_size(res), "dma-pl330");
INIT_LIST_HEAD(&pd->channels);
/* Initialize channel parameters */
INIT_LIST_HEAD(&pd->channels);
/* Initialize channel parameters */
- for (i = 0; i < pdat->nr_valid_peri; i++) {
- struct dma_pl330_peri *peri = &pdat->peri[i];
- pch = &pdmac->peripherals[i];
+ num_chan = max(pdat ? pdat->nr_valid_peri : 0, (u8)pi->pcfg.num_chan);
+ pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
- switch (peri->rqtype) {
- case MEMTOMEM:
+ for (i = 0; i < num_chan; i++) {
+ pch = &pdmac->peripherals[i];
+ if (pdat) {
+ struct dma_pl330_peri *peri = &pdat->peri[i];
+
+ switch (peri->rqtype) {
+ case MEMTOMEM:
+ dma_cap_set(DMA_MEMCPY, pd->cap_mask);
+ break;
+ case MEMTODEV:
+ case DEVTOMEM:
+ dma_cap_set(DMA_SLAVE, pd->cap_mask);
+ break;
+ default:
+ dev_err(&adev->dev, "DEVTODEV Not Supported\n");
+ continue;
+ }
+ pch->chan.private = peri;
+ } else {
dma_cap_set(DMA_MEMCPY, pd->cap_mask);
dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- break;
- case MEMTODEV:
- case DEVTOMEM:
- dma_cap_set(DMA_SLAVE, pd->cap_mask);
- break;
- default:
- dev_err(&adev->dev, "DEVTODEV Not Supported\n");
- continue;
+ pch->chan.private = NULL;
}
INIT_LIST_HEAD(&pch->work_list);
spin_lock_init(&pch->lock);
pch->pl330_chid = NULL;
}
INIT_LIST_HEAD(&pch->work_list);
spin_lock_init(&pch->lock);
pch->pl330_chid = NULL;
- pch->chan.private = peri;
pch->chan.device = pd;
pch->chan.chan_id = i;
pch->dmac = pdmac;
pch->chan.device = pd;
pch->chan.chan_id = i;
pch->dmac = pdmac;