int cpdma_ctlr_start(struct cpdma_ctlr *ctlr)
{
unsigned long flags;
int i;
spin_lock_irqsave(&ctlr->lock, flags);
if (ctlr->state != CPDMA_STATE_IDLE) {
spin_unlock_irqrestore(&ctlr->lock, flags);
return -EBUSY;
}
if (ctlr->params.has_soft_reset) {
unsigned timeout = 10 * 100;
dma_reg_write(ctlr, CPDMA_SOFTRESET, 1);
while (timeout) {
if (dma_reg_read(ctlr, CPDMA_SOFTRESET) == 0)
break;
udelay(10);
timeout--;
}
WARN_ON(!timeout);
}
for (i = 0; i < ctlr->num_chan; i++) {
__raw_writel(0, ctlr->params.txhdp + 4 * i);
__raw_writel(0, ctlr->params.rxhdp + 4 * i);
__raw_writel(0, ctlr->params.txcp + 4 * i);
__raw_writel(0, ctlr->params.rxcp + 4 * i);
}
dma_reg_write(ctlr, CPDMA_RXINTMASKCLEAR, 0xffffffff);
dma_reg_write(ctlr, CPDMA_TXINTMASKCLEAR, 0xffffffff);
dma_reg_write(ctlr, CPDMA_TXCONTROL, 1);
dma_reg_write(ctlr, CPDMA_RXCONTROL, 1);
ctlr->state = CPDMA_STATE_ACTIVE;
for (i = 0; i < ARRAY_SIZE(ctlr->channels); i++) {
if (ctlr->channels[i])
cpdma_chan_start(ctlr->channels[i]);
}
spin_unlock_irqrestore(&ctlr->lock, flags);
return 0;
}
int cpdma_ctlr_start(struct cpdma_ctlr *ctlr)
{
rtdm_lockctx_t context;
int i;
rtdm_lock_get_irqsave(&ctlr->lock, context);
if (ctlr->state != CPDMA_STATE_IDLE) {
rtdm_lock_put_irqrestore(&ctlr->lock, context);
return -EBUSY;
}
if (ctlr->params.has_soft_reset) {
unsigned long timeout = jiffies + HZ/10;
dma_reg_write(ctlr, CPDMA_SOFTRESET, 1);
while (time_before(jiffies, timeout)) {
if (dma_reg_read(ctlr, CPDMA_SOFTRESET) == 0)
break;
}
WARN_ON(!time_before(jiffies, timeout));
}
for (i = 0; i < ctlr->num_chan; i++) {
__raw_writel(0, ctlr->params.txhdp + 4 * i);
__raw_writel(0, ctlr->params.rxhdp + 4 * i);
__raw_writel(0, ctlr->params.txcp + 4 * i);
__raw_writel(0, ctlr->params.rxcp + 4 * i);
}
dma_reg_write(ctlr, CPDMA_RXINTMASKCLEAR, 0xffffffff);
dma_reg_write(ctlr, CPDMA_TXINTMASKCLEAR, 0xffffffff);
dma_reg_write(ctlr, CPDMA_TXCONTROL, 1);
dma_reg_write(ctlr, CPDMA_RXCONTROL, 1);
ctlr->state = CPDMA_STATE_ACTIVE;
for (i = 0; i < ARRAY_SIZE(ctlr->channels); i++) {
if (ctlr->channels[i])
cpdma_chan_start(ctlr->channels[i]);
}
rtdm_lock_put_irqrestore(&ctlr->lock, context);
return 0;
}
int cpdma_ctlr_dump(struct cpdma_ctlr *ctlr)
{
struct device *dev = ctlr->dev;
unsigned long flags;
int i;
spin_lock_irqsave(&ctlr->lock, flags);
dev_info(dev, "CPDMA: state: %s", cpdma_state_str[ctlr->state]);
dev_info(dev, "CPDMA: txidver: %x",
dma_reg_read(ctlr, CPDMA_TXIDVER));
dev_info(dev, "CPDMA: txcontrol: %x",
dma_reg_read(ctlr, CPDMA_TXCONTROL));
dev_info(dev, "CPDMA: txteardown: %x",
dma_reg_read(ctlr, CPDMA_TXTEARDOWN));
dev_info(dev, "CPDMA: rxidver: %x",
dma_reg_read(ctlr, CPDMA_RXIDVER));
dev_info(dev, "CPDMA: rxcontrol: %x",
dma_reg_read(ctlr, CPDMA_RXCONTROL));
dev_info(dev, "CPDMA: softreset: %x",
dma_reg_read(ctlr, CPDMA_SOFTRESET));
dev_info(dev, "CPDMA: rxteardown: %x",
dma_reg_read(ctlr, CPDMA_RXTEARDOWN));
dev_info(dev, "CPDMA: txintstatraw: %x",
dma_reg_read(ctlr, CPDMA_TXINTSTATRAW));
dev_info(dev, "CPDMA: txintstatmasked: %x",
dma_reg_read(ctlr, CPDMA_TXINTSTATMASKED));
dev_info(dev, "CPDMA: txintmaskset: %x",
dma_reg_read(ctlr, CPDMA_TXINTMASKSET));
dev_info(dev, "CPDMA: txintmaskclear: %x",
dma_reg_read(ctlr, CPDMA_TXINTMASKCLEAR));
dev_info(dev, "CPDMA: macinvector: %x",
dma_reg_read(ctlr, CPDMA_MACINVECTOR));
dev_info(dev, "CPDMA: maceoivector: %x",
dma_reg_read(ctlr, CPDMA_MACEOIVECTOR));
dev_info(dev, "CPDMA: rxintstatraw: %x",
dma_reg_read(ctlr, CPDMA_RXINTSTATRAW));
dev_info(dev, "CPDMA: rxintstatmasked: %x",
dma_reg_read(ctlr, CPDMA_RXINTSTATMASKED));
dev_info(dev, "CPDMA: rxintmaskset: %x",
dma_reg_read(ctlr, CPDMA_RXINTMASKSET));
dev_info(dev, "CPDMA: rxintmaskclear: %x",
dma_reg_read(ctlr, CPDMA_RXINTMASKCLEAR));
dev_info(dev, "CPDMA: dmaintstatraw: %x",
dma_reg_read(ctlr, CPDMA_DMAINTSTATRAW));
dev_info(dev, "CPDMA: dmaintstatmasked: %x",
dma_reg_read(ctlr, CPDMA_DMAINTSTATMASKED));
dev_info(dev, "CPDMA: dmaintmaskset: %x",
dma_reg_read(ctlr, CPDMA_DMAINTMASKSET));
dev_info(dev, "CPDMA: dmaintmaskclear: %x",
dma_reg_read(ctlr, CPDMA_DMAINTMASKCLEAR));
if (!ctlr->params.has_ext_regs) {
dev_info(dev, "CPDMA: dmacontrol: %x",
dma_reg_read(ctlr, CPDMA_DMACONTROL));
dev_info(dev, "CPDMA: dmastatus: %x",
dma_reg_read(ctlr, CPDMA_DMASTATUS));
dev_info(dev, "CPDMA: rxbuffofs: %x",
dma_reg_read(ctlr, CPDMA_RXBUFFOFS));
}
for (i = 0; i < ARRAY_SIZE(ctlr->channels); i++)
if (ctlr->channels[i])
cpdma_chan_dump(ctlr->channels[i]);
spin_unlock_irqrestore(&ctlr->lock, flags);
return 0;
}