Signed-off-by: Daniel Hellstrom daniel@gaisler.com --- drivers/net/greth.c | 78 ++++++++++++++++++++++++++++++++++++--------------- 1 files changed, 55 insertions(+), 23 deletions(-)
diff --git a/drivers/net/greth.c b/drivers/net/greth.c index 788aac8..cb68d45 100644 --- a/drivers/net/greth.c +++ b/drivers/net/greth.c @@ -42,6 +42,13 @@ #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 */ @@ -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(®s->mdio) & GRETH_MII_BUSY) { }
- GRETH_REGSAVE(®s->mdio, (0 << 11) | ((addr & 0x1F) << 6) | 2); + GRETH_REGSAVE(®s->mdio, ((phyaddr & 0x1F) << 11) | ((regaddr & 0x1F) << 6) | 2);
while (GRETH_REGLOAD(®s->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(®s->mdio) & GRETH_MII_BUSY) { }
GRETH_REGSAVE(®s->mdio, - ((data & 0xFFFF) << 16) | (0 << 11) | ((addr & 0x1F) << 6) - | 1); + ((data & 0xFFFF) << 16) | ((phyaddr & 0x1F) << 11) | + ((regaddr & 0x1F) << 6) | 1);
while (GRETH_REGLOAD(®s->mdio) & GRETH_MII_BUSY) { } @@ -214,6 +221,26 @@ 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); @@ -225,17 +252,21 @@ 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 @@ -246,16 +277,16 @@ 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) @@ -265,8 +296,8 @@ 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; @@ -279,8 +310,8 @@ 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; @@ -297,7 +328,7 @@ 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); } }
@@ -307,8 +338,8 @@ int greth_init_phy(greth_priv * dev, bd_t * bis) %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"); /* 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;
@@ -492,8 +523,7 @@ 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. */ @@ -530,7 +560,7 @@ int greth_recv(struct eth_device *dev) (unsigned int)greth->rxbd_max) ? greth-> rxbd_base : (greth->rxbd_curr + 1);
- }; + }
if (enable) { GRETH_REGORIN(®s->control, GRETH_RXEN); @@ -612,6 +642,7 @@ int greth_initialize(bd_t * bis) /* 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; }
@@ -640,5 +671,6 @@ 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; }