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path: root/drivers/net/greth.c
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Diffstat (limited to 'drivers/net/greth.c')
-rw-r--r--drivers/net/greth.c164
1 files changed, 94 insertions, 70 deletions
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
index 79bc4d9d2..6c3222694 100644
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -24,6 +24,8 @@
* MA 02111-1307 USA
*/
+/* #define DEBUG */
+
#include <common.h>
#include <command.h>
#include <net.h>
@@ -33,8 +35,6 @@
#include <ambapp.h>
#include <asm/leon.h>
-/* #define DEBUG */
-
#include "greth.h"
/* Default to 3s timeout on autonegotiation */
@@ -42,10 +42,17 @@
#define GRETH_PHY_TIMEOUT_MS 3000
#endif
+/* Default to PHY adrress 0 not not specified */
+#ifdef CONFIG_SYS_GRLIB_GRETH_PHYADDR
+#define GRETH_PHY_ADR_DEFAULT CONFIG_SYS_GRLIB_GRETH_PHYADDR
+#else
+#define GRETH_PHY_ADR_DEFAULT 0
+#endif
+
/* ByPass Cache when reading regs */
#define GRETH_REGLOAD(addr) SPARC_NOCACHE_READ(addr)
/* Write-through cache ==> no bypassing needed on writes */
-#define GRETH_REGSAVE(addr,data) (*(unsigned int *)(addr) = (data))
+#define GRETH_REGSAVE(addr,data) (*(volatile unsigned int *)(addr) = (data))
#define GRETH_REGORIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)|data)
#define GRETH_REGANDIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)&data)
@@ -102,12 +109,12 @@ typedef struct {
} greth_priv;
/* Read MII register 'addr' from core 'regs' */
-static int read_mii(int addr, volatile greth_regs * regs)
+static int read_mii(int phyaddr, int regaddr, volatile greth_regs * regs)
{
while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
}
- GRETH_REGSAVE(&regs->mdio, (0 << 11) | ((addr & 0x1F) << 6) | 2);
+ GRETH_REGSAVE(&regs->mdio, ((phyaddr & 0x1F) << 11) | ((regaddr & 0x1F) << 6) | 2);
while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
}
@@ -119,14 +126,14 @@ static int read_mii(int addr, volatile greth_regs * regs)
}
}
-static void write_mii(int addr, int data, volatile greth_regs * regs)
+static void write_mii(int phyaddr, int regaddr, int data, volatile greth_regs * regs)
{
while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
}
GRETH_REGSAVE(&regs->mdio,
- ((data & 0xFFFF) << 16) | (0 << 11) | ((addr & 0x1F) << 6)
- | 1);
+ ((data & 0xFFFF) << 16) | ((phyaddr & 0x1F) << 11) |
+ ((regaddr & 0x1F) << 6) | 1);
while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
}
@@ -142,11 +149,18 @@ int greth_init(struct eth_device *dev, bd_t * bis)
greth_priv *greth = dev->priv;
greth_regs *regs = greth->regs;
-#ifdef DEBUG
- printf("greth_init\n");
-#endif
- GRETH_REGSAVE(&regs->control, 0);
+ debug("greth_init\n");
+
+ /* Reset core */
+ GRETH_REGSAVE(&regs->control, (GRETH_RESET | (greth->gb << 8) |
+ (greth->sp << 7) | (greth->fd << 4)));
+
+ /* Wait for Reset to complete */
+ while ( GRETH_REGLOAD(&regs->control) & GRETH_RESET) ;
+
+ GRETH_REGSAVE(&regs->control,
+ ((greth->gb << 8) | (greth->sp << 7) | (greth->fd << 4)));
if (!greth->rxbd_base) {
@@ -154,7 +168,7 @@ int greth_init(struct eth_device *dev, bd_t * bis)
greth->rxbd_base = (greth_bd *)
memalign(0x1000, GRETH_RXBD_CNT * sizeof(greth_bd));
greth->txbd_base = (greth_bd *)
- memalign(0x1000, GRETH_RXBD_CNT * sizeof(greth_bd));
+ memalign(0x1000, GRETH_TXBD_CNT * sizeof(greth_bd));
/* allocate buffers to all descriptors */
greth->rxbuf_base =
@@ -186,7 +200,7 @@ int greth_init(struct eth_device *dev, bd_t * bis)
for (i = 0; i < GRETH_TXBD_CNT; i++) {
greth->txbd_base[i].addr = 0;
/* enable desciptor & set wrap bit if last descriptor */
- if (i >= (GRETH_RXBD_CNT - 1)) {
+ if (i >= (GRETH_TXBD_CNT - 1)) {
greth->txbd_base[i].stat = GRETH_BD_WR;
} else {
greth->txbd_base[i].stat = 0;
@@ -201,9 +215,7 @@ int greth_init(struct eth_device *dev, bd_t * bis)
/* Enable Transmitter, GRETH will now scan descriptors for packets
* to transmitt */
-#ifdef DEBUG
- printf("greth_init: enabling receiver\n");
-#endif
+ debug("greth_init: enabling receiver\n");
GRETH_REGORIN(&regs->control, GRETH_RXEN);
return 0;
@@ -219,6 +231,26 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
greth_regs *regs = dev->regs;
int tmp, tmp1, tmp2, i;
unsigned int start, timeout;
+ int phyaddr = GRETH_PHY_ADR_DEFAULT;
+
+#ifndef CONFIG_SYS_GRLIB_GRETH_PHYADDR
+ /* If BSP doesn't provide a hardcoded PHY address the driver will
+ * try to autodetect PHY address by stopping the search on the first
+ * PHY address which has REG0 implemented.
+ */
+ for (i=0; i<32; i++) {
+ tmp = read_mii(i, 0, regs);
+ if ( (tmp != 0) && (tmp != 0xffff) ) {
+ phyaddr = i;
+ break;
+ }
+ }
+#endif
+
+ /* Save PHY Address */
+ dev->phyaddr = phyaddr;
+
+ debug("GRETH PHY ADDRESS: %d\n", phyaddr);
/* X msecs to ticks */
timeout = usec2ticks(GRETH_PHY_TIMEOUT_MS * 1000);
@@ -230,17 +262,21 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
/* get phy control register default values */
- while ((tmp = read_mii(0, regs)) & 0x8000) {
- if (get_timer(start) > timeout)
+ while ((tmp = read_mii(phyaddr, 0, regs)) & 0x8000) {
+ if (get_timer(start) > timeout) {
+ debug("greth_init_phy: PHY read 1 failed\n");
return 1; /* Fail */
+ }
}
/* reset PHY and wait for completion */
- write_mii(0, 0x8000 | tmp, regs);
+ write_mii(phyaddr, 0, 0x8000 | tmp, regs);
- while (((tmp = read_mii(0, regs))) & 0x8000) {
- if (get_timer(start) > timeout)
+ while (((tmp = read_mii(phyaddr, 0, regs))) & 0x8000) {
+ if (get_timer(start) > timeout) {
+ debug("greth_init_phy: PHY read 2 failed\n");
return 1; /* Fail */
+ }
}
/* Check if PHY is autoneg capable and then determine operating
@@ -251,16 +287,16 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
dev->sp = 0;
dev->auto_neg = 0;
if (!((tmp >> 12) & 1)) {
- write_mii(0, 0, regs);
+ write_mii(phyaddr, 0, 0, regs);
} else {
/* wait for auto negotiation to complete and then check operating mode */
dev->auto_neg = 1;
i = 0;
- while (!(((tmp = read_mii(1, regs)) >> 5) & 1)) {
+ while (!(((tmp = read_mii(phyaddr, 1, regs)) >> 5) & 1)) {
if (get_timer(start) > timeout) {
printf("Auto negotiation timed out. "
"Selecting default config\n");
- tmp = read_mii(0, regs);
+ tmp = read_mii(phyaddr, 0, regs);
dev->gb = ((tmp >> 6) & 1)
&& !((tmp >> 13) & 1);
dev->sp = !((tmp >> 6) & 1)
@@ -270,8 +306,8 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
}
}
if ((tmp >> 8) & 1) {
- tmp1 = read_mii(9, regs);
- tmp2 = read_mii(10, regs);
+ tmp1 = read_mii(phyaddr, 9, regs);
+ tmp2 = read_mii(phyaddr, 10, regs);
if ((tmp1 & GRETH_MII_EXTADV_1000FD) &&
(tmp2 & GRETH_MII_EXTPRT_1000FD)) {
dev->gb = 1;
@@ -284,8 +320,8 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
}
}
if ((dev->gb == 0) || ((dev->gb == 1) && (dev->gbit_mac == 0))) {
- tmp1 = read_mii(4, regs);
- tmp2 = read_mii(5, regs);
+ tmp1 = read_mii(phyaddr, 4, regs);
+ tmp2 = read_mii(phyaddr, 5, regs);
if ((tmp1 & GRETH_MII_100TXFD) &&
(tmp2 & GRETH_MII_100TXFD)) {
dev->sp = 1;
@@ -302,28 +338,24 @@ int greth_init_phy(greth_priv * dev, bd_t * bis)
if ((dev->gb == 1) && (dev->gbit_mac == 0)) {
dev->gb = 0;
dev->fd = 0;
- write_mii(0, dev->sp << 13, regs);
+ write_mii(phyaddr, 0, dev->sp << 13, regs);
}
}
}
auto_neg_done:
-#ifdef DEBUG
- printf("%s GRETH Ethermac at [0x%x] irq %d. Running \
+ debug("%s GRETH Ethermac at [0x%x] irq %d. Running \
%d Mbps %s duplex\n", dev->gbit_mac ? "10/100/1000" : "10/100", (unsigned int)(regs), (unsigned int)(dev->irq), dev->gb ? 1000 : (dev->sp ? 100 : 10), dev->fd ? "full" : "half");
-#endif
/* Read out PHY info if extended registers are available */
if (tmp & 1) {
- tmp1 = read_mii(2, regs);
- tmp2 = read_mii(3, regs);
+ tmp1 = read_mii(phyaddr, 2, regs);
+ tmp2 = read_mii(phyaddr, 3, regs);
tmp1 = (tmp1 << 6) | ((tmp2 >> 10) & 0x3F);
tmp = tmp2 & 0xF;
tmp2 = (tmp2 >> 4) & 0x3F;
-#ifdef DEBUG
- printf("PHY: Vendor %x Device %x Revision %d\n", tmp1,
+ debug("PHY: Vendor %x Device %x Revision %d\n", tmp1,
tmp2, tmp);
-#endif
} else {
printf("PHY info not available\n");
}
@@ -340,9 +372,9 @@ void greth_halt(struct eth_device *dev)
greth_priv *greth;
greth_regs *regs;
int i;
-#ifdef DEBUG
- printf("greth_halt\n");
-#endif
+
+ debug("greth_halt\n");
+
if (!dev || !dev->priv)
return;
@@ -378,9 +410,9 @@ int greth_send(struct eth_device *dev, volatile void *eth_data, int data_length)
greth_bd *txbd;
void *txbuf;
unsigned int status;
-#ifdef DEBUG
- printf("greth_send\n");
-#endif
+
+ debug("greth_send\n");
+
/* send data, wait for data to be sent, then return */
if (((unsigned int)eth_data & (GRETH_BUF_ALIGN - 1))
&& !greth->gbit_mac) {
@@ -389,9 +421,6 @@ int greth_send(struct eth_device *dev, volatile void *eth_data, int data_length)
*/
if (!greth->txbuf) {
greth->txbuf = malloc(GRETH_RXBUF_SIZE);
-#ifdef DEBUG
- printf("GRETH: allocated aligned tx-buf\n");
-#endif
}
txbuf = greth->txbuf;
@@ -457,9 +486,7 @@ int greth_recv(struct eth_device *dev)
unsigned char *d;
int enable = 0;
int i;
-#ifdef DEBUG
-/* printf("greth_recv\n"); */
-#endif
+
/* Receive One packet only, but clear as many error packets as there are
* available.
*/
@@ -476,10 +503,9 @@ int greth_recv(struct eth_device *dev)
if (status & GRETH_BD_EN) {
goto done;
}
-#ifdef DEBUG
- printf("greth_recv: packet 0x%lx, 0x%lx, len: %d\n",
+
+ debug("greth_recv: packet 0x%lx, 0x%lx, len: %d\n",
(unsigned int)rxbd, status, status & GRETH_BD_LEN);
-#endif
/* Check status for errors.
*/
@@ -507,19 +533,18 @@ int greth_recv(struct eth_device *dev)
for (i = 0; i < GRETH_RXBD_CNT; i++) {
printf("[%d]: Stat=0x%lx, Addr=0x%lx\n", i,
GRETH_REGLOAD(&greth->rxbd_base[i].stat),
- GRETH_REGLOAD(&greth->rxbd_base[i].
- addr));
+ GRETH_REGLOAD(&greth->rxbd_base[i].addr));
}
} else {
/* Process the incoming packet. */
len = status & GRETH_BD_LEN;
d = (char *)rxbd->addr;
-#ifdef DEBUG
- printf
+
+ debug
("greth_recv: new packet, length: %d. data: %x %x %x %x %x %x %x %x\n",
len, d[0], d[1], d[2], d[3], d[4], d[5], d[6],
d[7]);
-#endif
+
/* flush all data cache to make sure we're not reading old packet data */
sparc_dcache_flush_all();
@@ -545,7 +570,7 @@ int greth_recv(struct eth_device *dev)
(unsigned int)greth->rxbd_max) ? greth->
rxbd_base : (greth->rxbd_curr + 1);
- };
+ }
if (enable) {
GRETH_REGORIN(&regs->control, GRETH_RXEN);
@@ -567,10 +592,9 @@ void greth_set_hwaddr(greth_priv * greth, unsigned char *mac)
greth->regs->esa_msb = (mac[0] << 8) | mac[1];
greth->regs->esa_lsb =
(mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5];
-#ifdef DEBUG
- printf("GRETH: New MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
+
+ debug("GRETH: New MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
-#endif
}
int greth_initialize(bd_t * bis)
@@ -581,9 +605,9 @@ int greth_initialize(bd_t * bis)
int i;
char *addr_str, *end;
unsigned char addr[6];
-#ifdef DEBUG
- printf("Scanning for GRETH\n");
-#endif
+
+ debug("Scanning for GRETH\n");
+
/* Find Device & IRQ via AMBA Plug&Play information */
if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_ETHMAC, &apbdev) != 1) {
return -1; /* GRETH not found */
@@ -596,9 +620,7 @@ int greth_initialize(bd_t * bis)
greth->regs = (greth_regs *) apbdev.address;
greth->irq = apbdev.irq;
-#ifdef DEBUG
- printf("Found GRETH at 0x%lx, irq %d\n", greth->regs, greth->irq);
-#endif
+ debug("Found GRETH at 0x%lx, irq %d\n", greth->regs, greth->irq);
dev->priv = (void *)greth;
dev->iobase = (unsigned int)greth->regs;
dev->init = greth_init;
@@ -622,14 +644,15 @@ int greth_initialize(bd_t * bis)
/* Make descriptor string */
if (greth->gbit_mac) {
- sprintf(dev->name, "GRETH 10/100/GB");
+ sprintf(dev->name, "GRETH_10/100/GB");
} else {
- sprintf(dev->name, "GRETH 10/100");
+ sprintf(dev->name, "GRETH_10/100");
}
/* initiate PHY, select speed/duplex depending on connected PHY */
if (greth_init_phy(greth, bis)) {
/* Failed to init PHY (timedout) */
+ debug("GRETH[0x%08x]: Failed to init PHY\n", greth->regs);
return -1;
}
@@ -658,5 +681,6 @@ int greth_initialize(bd_t * bis)
/* set and remember MAC address */
greth_set_hwaddr(greth, addr);
+ debug("GRETH[0x%08x]: Initialized successfully\n", greth->regs);
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 13:37:34 +0000