Older DesignWare Ethernet MAC versions that this driver supports can only work with 32-bit DMA source/destination addresses. Some platforms have no physical RAM at the lowest 4GB address space. For these platforms the driver must translate DMA addresses to/from physical memory addresses.
Call translation routines so that properly configured platforms can use the DesignWare Ethernet MAC. For platforms using device-tree this usually means adding dma-ranges property to the bus the device node is in.
Signed-off-by: Baruch Siach baruch@tkos.co.il --- drivers/net/designware.c | 31 ++++++++++++++++++++----------- drivers/net/designware.h | 1 + 2 files changed, 21 insertions(+), 11 deletions(-)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c index 20b86e74cecf..a174344b3ef5 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -19,6 +19,7 @@ #include <net.h> #include <pci.h> #include <reset.h> +#include <phys2bus.h> #include <asm/cache.h> #include <dm/device_compat.h> #include <dm/device-internal.h> @@ -232,8 +233,10 @@ static void tx_descs_init(struct dw_eth_dev *priv)
for (idx = 0; idx < CFG_TX_DESCR_NUM; idx++) { desc_p = &desc_table_p[idx]; - desc_p->dmamac_addr = (ulong)&txbuffs[idx * CFG_ETH_BUFSIZE]; - desc_p->dmamac_next = (ulong)&desc_table_p[idx + 1]; + desc_p->dmamac_addr = dev_phys_to_bus(priv->dev, + (ulong)&txbuffs[idx * CFG_ETH_BUFSIZE]); + desc_p->dmamac_next = dev_phys_to_bus(priv->dev, + (ulong)&desc_table_p[idx + 1]);
#if defined(CONFIG_DW_ALTDESCRIPTOR) desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST | @@ -251,14 +254,15 @@ static void tx_descs_init(struct dw_eth_dev *priv) }
/* Correcting the last pointer of the chain */ - desc_p->dmamac_next = (ulong)&desc_table_p[0]; + desc_p->dmamac_next = dev_phys_to_bus(priv->dev, (ulong)&desc_table_p[0]);
/* Flush all Tx buffer descriptors at once */ flush_dcache_range((ulong)priv->tx_mac_descrtable, (ulong)priv->tx_mac_descrtable + sizeof(priv->tx_mac_descrtable));
- writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr); + writel(dev_phys_to_bus(priv->dev, (ulong)&desc_table_p[0]), + &dma_p->txdesclistaddr); priv->tx_currdescnum = 0; }
@@ -280,8 +284,10 @@ static void rx_descs_init(struct dw_eth_dev *priv)
for (idx = 0; idx < CFG_RX_DESCR_NUM; idx++) { desc_p = &desc_table_p[idx]; - desc_p->dmamac_addr = (ulong)&rxbuffs[idx * CFG_ETH_BUFSIZE]; - desc_p->dmamac_next = (ulong)&desc_table_p[idx + 1]; + desc_p->dmamac_addr = dev_phys_to_bus(priv->dev, + (ulong)&rxbuffs[idx * CFG_ETH_BUFSIZE]); + desc_p->dmamac_next = dev_phys_to_bus(priv->dev, + (ulong)&desc_table_p[idx + 1]);
desc_p->dmamac_cntl = (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | @@ -291,14 +297,15 @@ static void rx_descs_init(struct dw_eth_dev *priv) }
/* Correcting the last pointer of the chain */ - desc_p->dmamac_next = (ulong)&desc_table_p[0]; + desc_p->dmamac_next = dev_phys_to_bus(priv->dev, (ulong)&desc_table_p[0]);
/* Flush all Rx buffer descriptors at once */ flush_dcache_range((ulong)priv->rx_mac_descrtable, (ulong)priv->rx_mac_descrtable + sizeof(priv->rx_mac_descrtable));
- writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr); + writel(dev_phys_to_bus(priv->dev, (ulong)&desc_table_p[0]), + &dma_p->rxdesclistaddr); priv->rx_currdescnum = 0; }
@@ -448,7 +455,7 @@ static int _dw_eth_send(struct dw_eth_dev *priv, void *packet, int length) ulong desc_start = (ulong)desc_p; ulong desc_end = desc_start + roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN); - ulong data_start = desc_p->dmamac_addr; + ulong data_start = dev_bus_to_phys(priv->dev, desc_p->dmamac_addr); ulong data_end = data_start + roundup(length, ARCH_DMA_MINALIGN); /* * Strictly we only need to invalidate the "txrx_status" field @@ -515,7 +522,7 @@ static int _dw_eth_recv(struct dw_eth_dev *priv, uchar **packetp) ulong desc_start = (ulong)desc_p; ulong desc_end = desc_start + roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN); - ulong data_start = desc_p->dmamac_addr; + ulong data_start = dev_bus_to_phys(priv->dev, desc_p->dmamac_addr); ulong data_end;
/* Invalidate entire buffer descriptor */ @@ -532,7 +539,8 @@ static int _dw_eth_recv(struct dw_eth_dev *priv, uchar **packetp) /* Invalidate received data */ data_end = data_start + roundup(length, ARCH_DMA_MINALIGN); invalidate_dcache_range(data_start, data_end); - *packetp = (uchar *)(ulong)desc_p->dmamac_addr; + *packetp = (uchar *)(ulong)dev_bus_to_phys(priv->dev, + desc_p->dmamac_addr); }
return length; @@ -757,6 +765,7 @@ int designware_eth_probe(struct udevice *dev) goto mdio_err; } priv->bus = miiphy_get_dev_by_name(dev->name); + priv->dev = dev;
ret = dw_phy_init(priv, dev); debug("%s, ret=%d\n", __func__, ret); diff --git a/drivers/net/designware.h b/drivers/net/designware.h index 9da4e902cb0d..918a38615ad6 100644 --- a/drivers/net/designware.h +++ b/drivers/net/designware.h @@ -241,6 +241,7 @@ struct dw_eth_dev { int clock_count; /* number of clock in clock list */ #endif
+ struct udevice *dev; struct phy_device *phydev; struct mii_dev *bus; };