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net: macb: add dma_burst_length config

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GEM support higher DMA burst writes/reads than the default (4).
add configuration structure with dma burst length so it could be
applied later to DMA configuration.

Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Ramon Fried 2019-07-16 22:04:35 +03:00 committed by Joe Hershberger
parent 5a1899f9fc
commit ed3c64f1ac
1 changed files with 21 additions and 1 deletions
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22
drivers/net/macb.c
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@ -82,6 +82,7 @@ struct macb_dma_desc {
struct macb_device {
void *regs;
unsigned int dma_burst_length;
unsigned int rx_tail;
unsigned int tx_head;
@ -118,6 +119,11 @@ struct macb_device {
phy_interface_t phy_interface;
#endif
};
struct macb_config {
unsigned int dma_burst_length;
};
#ifndef CONFIG_DM_ETH
#define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
#endif
@ -1135,8 +1141,13 @@ static int macb_enable_clk(struct udevice *dev)
}
#endif
static const struct macb_config default_gem_config = {
.dma_burst_length = 16,
};
static int macb_eth_probe(struct udevice *dev)
{
const struct macb_config *macb_config;
struct eth_pdata *pdata = dev_get_platdata(dev);
struct macb_device *macb = dev_get_priv(dev);
const char *phy_mode;
@ -1153,6 +1164,11 @@ static int macb_eth_probe(struct udevice *dev)
macb->regs = (void *)pdata->iobase;
macb_config = (struct macb_config *)dev_get_driver_data(dev);
if (!macb_config)
macb_config = &default_gem_config;
macb->dma_burst_length = macb_config->dma_burst_length;
#ifdef CONFIG_CLK
ret = macb_enable_clk(dev);
if (ret)
@ -1213,12 +1229,16 @@ static int macb_eth_ofdata_to_platdata(struct udevice *dev)
return macb_late_eth_ofdata_to_platdata(dev);
}
static const struct macb_config sama5d4_config = {
.dma_burst_length = 4,
};
static const struct udevice_id macb_eth_ids[] = {
{ .compatible = "cdns,macb" },
{ .compatible = "cdns,at91sam9260-macb" },
{ .compatible = "atmel,sama5d2-gem" },
{ .compatible = "atmel,sama5d3-gem" },
{ .compatible = "atmel,sama5d4-gem" },
{ .compatible = "atmel,sama5d4-gem", .data = (ulong)&sama5d4_config },
{ .compatible = "cdns,zynq-gem" },
{ }
};