+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010-2011 Calxeda, Inc.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
+#include <net.h>
#include <linux/compiler.h>
+#include <linux/delay.h>
#include <linux/err.h>
#include <asm/io.h>
+#include <dm.h>
+#include <dm/device-internal.h> /* for dev_set_priv() */
#define TX_NUM_DESC 1
#define RX_NUM_DESC 32
__le32 res[3];
};
+static struct xgmac_regs *xgmac_get_regs(struct eth_pdata *pdata)
+{
+ /*
+ * We use PHYS_64BIT on Highbank, so phys_addr_t is bigger than
+ * a pointer. U-Boot doesn't use LPAE (not even the MMU on highbank),
+ * so we can't access anything above 4GB.
+ * We have a check in the probe function below the ensure this,
+ * so casting to a 32-bit pointer type is fine here.
+ */
+ return (struct xgmac_regs *)(uintptr_t)pdata->iobase;
+}
+
/* XGMAC Descriptor Access Helpers */
static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz)
{
u32 tx_currdesc;
u32 rx_currdesc;
-
- struct eth_device *dev;
} __aligned(32);
/*
* advanced descriptors.
*/
-static void init_rx_desc(struct calxeda_eth_dev *priv)
+static void init_rx_desc(struct eth_pdata *pdata, struct calxeda_eth_dev *priv)
{
struct xgmac_dma_desc *rxdesc = priv->rx_chain;
- struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
void *rxbuffer = priv->rxbuffer;
int i;
}
}
-static void init_tx_desc(struct calxeda_eth_dev *priv)
+static void init_tx_desc(struct eth_pdata *pdata, struct calxeda_eth_dev *priv)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
desc_init_tx_desc(priv->tx_chain, TX_NUM_DESC);
writel((ulong)priv->tx_chain, ®s->txdesclist);
}
-static int xgmac_reset(struct eth_device *dev)
+static int xgmac_reset(struct xgmac_regs *regs)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
int timeout = MAC_TIMEOUT;
u32 value;
return timeout;
}
-static void xgmac_hwmacaddr(struct eth_device *dev)
+static void xgmac_hwmacaddr(struct eth_pdata *pdata)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
u32 macaddr[2];
- memcpy(macaddr, dev->enetaddr, 6);
+ memcpy(macaddr, pdata->enetaddr, ARP_HLEN);
writel(macaddr[1], ®s->macaddr[0].hi);
writel(macaddr[0], ®s->macaddr[0].lo);
}
-static int xgmac_init(struct eth_device *dev, bd_t * bis)
+static int xgmac_eth_start(struct udevice *dev)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
- struct calxeda_eth_dev *priv = dev->priv;
- int value;
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
+ struct calxeda_eth_dev *priv = dev_get_priv(dev);
+ u32 value;
- if (xgmac_reset(dev) < 0)
- return -1;
+ if (xgmac_reset(regs) < 0)
+ return -ETIMEDOUT;
/* set the hardware MAC address */
- xgmac_hwmacaddr(dev);
+ xgmac_hwmacaddr(pdata);
/* set the AXI bus modes */
value = XGMAC_DMA_BUSMODE_ATDS |
writel(value, ®s->flow_control);
/* Initialize the descriptor chains */
- init_rx_desc(priv);
- init_tx_desc(priv);
+ init_rx_desc(pdata, priv);
+ init_tx_desc(pdata, priv);
/* must set to 0, or when started up will cause issues */
priv->tx_currdesc = 0;
return 0;
}
-static int xgmac_tx(struct eth_device *dev, void *packet, int length)
+static int xgmac_tx(struct udevice *dev, void *packet, int length)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
- struct calxeda_eth_dev *priv = dev->priv;
+ struct calxeda_eth_dev *priv = dev_get_priv(dev);
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
u32 currdesc = priv->tx_currdesc;
struct xgmac_dma_desc *txdesc = &priv->tx_chain[currdesc];
int timeout;
return 0;
}
-static int xgmac_rx(struct eth_device *dev)
+static int xgmac_rx(struct udevice *dev, int flags, uchar **packetp)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
- struct calxeda_eth_dev *priv = dev->priv;
+ struct calxeda_eth_dev *priv = dev_get_priv(dev);
u32 currdesc = priv->rx_currdesc;
struct xgmac_dma_desc *rxdesc = &priv->rx_chain[currdesc];
int length = 0;
/* check if the host has the desc */
if (desc_get_owner(rxdesc))
- return -1; /* something bad happened */
+ return -EAGAIN; /* the MAC is still chewing on it */
length = desc_get_rx_frame_len(rxdesc);
+ *packetp = desc_get_buf_addr(rxdesc);
- NetReceive(desc_get_buf_addr(rxdesc), length);
+ priv->rx_currdesc = (currdesc + 1) & (RX_NUM_DESC - 1);
+
+ return length;
+}
+
+static int xgmac_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
+ struct calxeda_eth_dev *priv = dev_get_priv(dev);
+ u32 rxdesc = ((char *)packet - priv->rxbuffer) / ETH_BUF_SZ;
+ struct xgmac_dma_desc *p = &priv->rx_chain[rxdesc];
/* set descriptor back to owned by XGMAC */
- desc_set_rx_owner(rxdesc);
+ desc_set_rx_owner(p);
writel(1, ®s->rxpoll);
- priv->rx_currdesc = (currdesc + 1) & (RX_NUM_DESC - 1);
-
- return length;
+ return 0;
}
-static void xgmac_halt(struct eth_device *dev)
+static void xgmac_eth_stop(struct udevice *dev)
{
- struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
- struct calxeda_eth_dev *priv = dev->priv;
+ struct calxeda_eth_dev *priv = dev_get_priv(dev);
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
int value;
/* Disable TX/RX */
priv->rx_currdesc = 0;
}
-int calxedaxgmac_initialize(u32 id, ulong base_addr)
+/*
+ * Changing the MAC address is not a good idea, as the fabric would
+ * need to know about this as well (it does not learn MAC addresses).
+ */
+static int xgmac_eth_write_hwaddr(struct udevice *dev)
+{
+ return -ENOSYS;
+}
+
+static int xgmac_eth_read_rom_hwaddr(struct udevice *dev)
{
- struct eth_device *dev;
- struct calxeda_eth_dev *priv;
- struct xgmac_regs *regs;
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
u32 macaddr[2];
- regs = (struct xgmac_regs *)base_addr;
+ /* The MAC address is already configured, so read it from registers. */
+ macaddr[1] = readl(®s->macaddr[0].hi);
+ macaddr[0] = readl(®s->macaddr[0].lo);
+ memcpy(pdata->enetaddr, macaddr, ARP_HLEN);
- /* check hardware version */
- if (readl(®s->version) != 0x1012)
- return -1;
+ return 0;
+}
- dev = malloc(sizeof(*dev));
- if (!dev)
- return 0;
- memset(dev, 0, sizeof(*dev));
+static int xgmac_ofdata_to_platdata(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct calxeda_eth_dev *priv;
/* Structure must be aligned, because it contains the descriptors */
priv = memalign(32, sizeof(*priv));
- if (!priv) {
- free(dev);
- return 0;
+ if (!priv)
+ return -ENOMEM;
+ dev_set_priv(dev, priv);
+
+ pdata->iobase = devfdt_get_addr(dev);
+ if (pdata->iobase == FDT_ADDR_T_NONE) {
+ printf("%s: Cannot find XGMAC base address\n", __func__);
+ return -EINVAL;
+ }
+ if (pdata->iobase >= (1ULL << 32)) {
+ printf("%s: MMIO base address cannot be above 4GB\n", __func__);
+ return -EINVAL;
}
- dev->iobase = (int)base_addr;
- dev->priv = priv;
- priv->dev = dev;
- sprintf(dev->name, "xgmac%d", id);
+ return 0;
+}
- /* The MAC address is already configured, so read it from registers. */
- macaddr[1] = readl(®s->macaddr[0].hi);
- macaddr[0] = readl(®s->macaddr[0].lo);
- memcpy(dev->enetaddr, macaddr, 6);
+static int xgmac_eth_probe(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct xgmac_regs *regs = xgmac_get_regs(pdata);
- dev->init = xgmac_init;
- dev->send = xgmac_tx;
- dev->recv = xgmac_rx;
- dev->halt = xgmac_halt;
+ /* check hardware version */
+ if (readl(®s->version) != 0x1012)
+ return -ENODEV;
- eth_register(dev);
+ xgmac_eth_read_rom_hwaddr(dev);
- return 1;
+ return 0;
}
+
+static const struct eth_ops xgmac_eth_ops = {
+ .start = xgmac_eth_start,
+ .send = xgmac_tx,
+ .recv = xgmac_rx,
+ .free_pkt = xgmac_free_pkt,
+ .stop = xgmac_eth_stop,
+ .write_hwaddr = xgmac_eth_write_hwaddr,
+ .read_rom_hwaddr = xgmac_eth_read_rom_hwaddr,
+};
+
+static const struct udevice_id xgmac_eth_ids[] = {
+ { .compatible = "calxeda,hb-xgmac" },
+ { }
+};
+
+U_BOOT_DRIVER(eth_xgmac) = {
+ .name = "eth_xgmac",
+ .id = UCLASS_ETH,
+ .of_match = xgmac_eth_ids,
+ .of_to_plat = xgmac_ofdata_to_platdata,
+ .probe = xgmac_eth_probe,
+ .ops = &xgmac_eth_ops,
+ .plat_auto = sizeof(struct eth_pdata),
+};
projects / platform / kernel / u-boot.git / blobdiff