* Based on Xilinx gmac driver:
* (C) Copyright 2011 Xilinx
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <phy.h>
#include <miiphy.h>
#include <watchdog.h>
+#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
#if !defined(CONFIG_PHYLIB)
#define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000
#define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */
-#define ZYNQ_GEM_TXSR_HRESPNOK_MASK 0x00000100 /* Transmit hresp not OK */
-#define ZYNQ_GEM_TXSR_URUN_MASK 0x00000040 /* Transmit underrun */
-/* Transmit buffs exhausted mid frame */
-#define ZYNQ_GEM_TXSR_BUFEXH_MASK 0x00000010
-
#define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */
#define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */
#define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */
ZYNQ_GEM_DMACR_TXSIZE | \
ZYNQ_GEM_DMACR_RXBUF)
+/* Use MII register 1 (MII status register) to detect PHY */
+#define PHY_DETECT_REG 1
+
+/* Mask used to verify certain PHY features (or register contents)
+ * in the register above:
+ * 0x1000: 10Mbps full duplex support
+ * 0x0800: 10Mbps half duplex support
+ * 0x0008: Auto-negotiation support
+ */
+#define PHY_DETECT_MASK 0x1808
+
+/* TX BD status masks */
+#define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff
+#define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000
+#define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000
+
/* Device registers */
struct zynq_gem_regs {
u32 nwctrl; /* Network Control reg */
};
#define RX_BUF 3
+/* Page table entries are set to 1MB, or multiples of 1MB
+ * (not < 1MB). driver uses less bd's so use 1MB bdspace.
+ */
+#define BD_SPACE 0x100000
+/* BD separation space */
+#define BD_SEPRN_SPACE 64
/* Initialized, rxbd_current, rx_first_buf must be 0 after init */
struct zynq_gem_priv {
- struct emac_bd tx_bd;
- struct emac_bd rx_bd[RX_BUF];
- char rxbuffers[RX_BUF * PKTSIZE_ALIGN];
+ struct emac_bd *tx_bd;
+ struct emac_bd *rx_bd;
+ char *rxbuffers;
u32 rxbd_current;
u32 rx_first_buf;
int phyaddr;
+ u32 emio;
int init;
struct phy_device *phydev;
struct mii_dev *bus;
ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
}
+static void phy_detection(struct eth_device *dev)
+{
+ int i;
+ u16 phyreg;
+ struct zynq_gem_priv *priv = dev->priv;
+
+ if (priv->phyaddr != -1) {
+ phyread(dev, priv->phyaddr, PHY_DETECT_REG, &phyreg);
+ if ((phyreg != 0xFFFF) &&
+ ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
+ /* Found a valid PHY address */
+ debug("Default phy address %d is valid\n",
+ priv->phyaddr);
+ return;
+ } else {
+ debug("PHY address is not setup correctly %d\n",
+ priv->phyaddr);
+ priv->phyaddr = -1;
+ }
+ }
+
+ debug("detecting phy address\n");
+ if (priv->phyaddr == -1) {
+ /* detect the PHY address */
+ for (i = 31; i >= 0; i--) {
+ phyread(dev, i, PHY_DETECT_REG, &phyreg);
+ if ((phyreg != 0xFFFF) &&
+ ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
+ /* Found a valid PHY address */
+ priv->phyaddr = i;
+ debug("Found valid phy address, %d\n", i);
+ return;
+ }
+ }
+ }
+ printf("PHY is not detected\n");
+}
+
static int zynq_gem_setup_mac(struct eth_device *dev)
{
u32 i, macaddrlow, macaddrhigh;
readl(®s->stat[i]);
/* Setup RxBD space */
- memset(&(priv->rx_bd), 0, sizeof(priv->rx_bd));
- /* Create the RxBD ring */
- memset(&(priv->rxbuffers), 0, sizeof(priv->rxbuffers));
+ memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd));
for (i = 0; i < RX_BUF; i++) {
priv->rx_bd[i].status = 0xF0000000;
priv->rx_bd[i].addr =
- (u32)((char *)&(priv->rxbuffers) +
+ ((u32)(priv->rxbuffers) +
(i * PKTSIZE_ALIGN));
}
/* WRAP bit to last BD */
priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
/* Write RxBDs to IP */
- writel((u32)&(priv->rx_bd), ®s->rxqbase);
+ writel((u32)priv->rx_bd, ®s->rxqbase);
/* Setup for DMA Configuration register */
writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr);
priv->init++;
}
+ phy_detection(dev);
+
/* interface - look at tsec */
phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
break;
}
- /* FIXME maybe better to define gem address in hardware.h */
- zynq_slcr_gem_clk_setup(dev->iobase != 0xE000B000, rclk, clk);
+
+ /* Change the rclk and clk only not using EMIO interface */
+ if (!priv->emio)
+ zynq_slcr_gem_clk_setup(dev->iobase !=
+ ZYNQ_GEM_BASEADDR0, rclk, clk);
setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
ZYNQ_GEM_NWCTRL_TXEN_MASK);
static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
{
- u32 status;
+ u32 addr, size;
struct zynq_gem_priv *priv = dev->priv;
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
- const u32 mask = ZYNQ_GEM_TXSR_HRESPNOK_MASK | \
- ZYNQ_GEM_TXSR_URUN_MASK | ZYNQ_GEM_TXSR_BUFEXH_MASK;
/* setup BD */
- writel((u32)&(priv->tx_bd), ®s->txqbase);
+ writel((u32)priv->tx_bd, ®s->txqbase);
/* Setup Tx BD */
- memset((void *)&(priv->tx_bd), 0, sizeof(struct emac_bd));
+ memset(priv->tx_bd, 0, sizeof(struct emac_bd));
+
+ priv->tx_bd->addr = (u32)ptr;
+ priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) |
+ ZYNQ_GEM_TXBUF_LAST_MASK;
- priv->tx_bd.addr = (u32)ptr;
- priv->tx_bd.status = len | ZYNQ_GEM_TXBUF_LAST_MASK;
+ addr = (u32) ptr;
+ addr &= ~(ARCH_DMA_MINALIGN - 1);
+ size = roundup(len, ARCH_DMA_MINALIGN);
+ flush_dcache_range(addr, addr + size);
+ barrier();
/* Start transmit */
setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
- /* Read the stat register to know if the packet has been transmitted */
- status = readl(®s->txsr);
- if (status & mask)
- printf("Something has gone wrong here!? Status is 0x%x.\n",
- status);
+ /* Read TX BD status */
+ if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_UNDERRUN)
+ printf("TX underrun\n");
+ if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED)
+ printf("TX buffers exhausted in mid frame\n");
- /* Clear Tx status register before leaving . */
- writel(status, ®s->txsr);
return 0;
}
frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
if (frame_len) {
- NetReceive((u8 *) (current_bd->addr &
- ZYNQ_GEM_RXBUF_ADD_MASK), frame_len);
+ u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK;
+ addr &= ~(ARCH_DMA_MINALIGN - 1);
+ u32 size = roundup(frame_len, ARCH_DMA_MINALIGN);
+ invalidate_dcache_range(addr, addr + size);
+
+ NetReceive((u8 *)addr, frame_len);
if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
priv->rx_first_buf = priv->rxbd_current;
return phywrite(dev, addr, reg, val);
}
-int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr)
+int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio)
{
struct eth_device *dev;
struct zynq_gem_priv *priv;
+ void *bd_space;
dev = calloc(1, sizeof(*dev));
if (dev == NULL)
}
priv = dev->priv;
+ /* Align rxbuffers to ARCH_DMA_MINALIGN */
+ priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN);
+ memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN);
+
+ /* Align bd_space to 1MB */
+ bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
+ mmu_set_region_dcache_behaviour((u32)bd_space, BD_SPACE, DCACHE_OFF);
+
+ /* Initialize the bd spaces for tx and rx bd's */
+ priv->tx_bd = (struct emac_bd *)bd_space;
+ priv->rx_bd = (struct emac_bd *)((u32)bd_space + BD_SEPRN_SPACE);
+
priv->phyaddr = phy_addr;
+ priv->emio = emio;
sprintf(dev->name, "Gem.%x", base_addr);
projects / karo-tx-uboot.git / blobdiff