* Based on Xilinx gmac driver:
* (C) Copyright 2011 Xilinx
*
- * SPDX-License-Identifier: GPL-2.0+
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#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 */
*/
#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
+
+/* Clock frequencies for different speeds */
+#define ZYNQ_GEM_FREQUENCY_10 2500000UL
+#define ZYNQ_GEM_FREQUENCY_100 25000000UL
+#define ZYNQ_GEM_FREQUENCY_1000 125000000UL
+
/* 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;
static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
{
- u32 i, rclk, clk = 0;
+ u32 i;
+ unsigned long clk_rate = 0;
struct phy_device *phydev;
const u32 stat_size = (sizeof(struct zynq_gem_regs) -
offsetof(struct zynq_gem_regs, stat)) / 4;
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);
phy_config(phydev);
phy_startup(phydev);
+ if (!phydev->link) {
+ printf("%s: No link.\n", phydev->dev->name);
+ return -1;
+ }
+
switch (phydev->speed) {
case SPEED_1000:
writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000,
®s->nwcfg);
- rclk = (0 << 4) | (1 << 0);
- clk = (1 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
+ clk_rate = ZYNQ_GEM_FREQUENCY_1000;
break;
case SPEED_100:
clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000,
ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100);
- rclk = 1 << 0;
- clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
+ clk_rate = ZYNQ_GEM_FREQUENCY_100;
break;
case SPEED_10:
- rclk = 1 << 0;
- /* FIXME untested */
- clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
+ clk_rate = ZYNQ_GEM_FREQUENCY_10;
break;
}
/* 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);
+ ZYNQ_GEM_BASEADDR0, clk_rate);
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;
{
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;
projects / karo-tx-uboot.git / blobdiff