[U-Boot] [PATCH 3/4] davinci: emac: add support for more than 1 PHYs
nagabhushana.netagunte at ti.com
nagabhushana.netagunte at ti.com
Fri Sep 30 13:57:11 CEST 2011
From: Nagabhushana Netagunte <nagabhushana.netagunte at ti.com>
add support for more than 1 PHYs. Many of the davinci platforms have more
than 1 PHYs on thier board. This patch extends support in davinci emac
driver for upto 3 PHYs.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj at ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte at ti.com>
---
drivers/net/davinci_emac.c | 148 +++++++++++++++++++++++++++-----------------
1 files changed, 90 insertions(+), 58 deletions(-)
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 0d67a06..ed8fbfe 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -81,9 +81,12 @@ static int emac_rx_queue_active = 0;
static unsigned char emac_rx_buffers[EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
/* PHY address for a discovered PHY (0xff - not found) */
-static volatile u_int8_t active_phy_addr = 0xff;
+static volatile u_int8_t active_phy_addr[3] = { 0xff, 0xff, 0xff };
-phy_t phy;
+/* number of PHY found active */
+static volatile u_int8_t num_phy;
+
+phy_t phy[3];
static int davinci_eth_set_mac_addr(struct eth_device *dev)
{
@@ -147,27 +150,30 @@ static int davinci_eth_phy_detect(void)
{
u_int32_t phy_act_state;
int i;
+ int j;
+ unsigned int count = 0;
+
+ active_phy_addr[0] = 0xff;
+ active_phy_addr[1] = 0xff;
+ active_phy_addr[2] = 0xff;
- active_phy_addr = 0xff;
+ udelay(1000);
+ phy_act_state = readl(&adap_mdio->ALIVE);
- phy_act_state = readl(&adap_mdio->ALIVE) & EMAC_MDIO_PHY_MASK;
if (phy_act_state == 0)
- return(0); /* No active PHYs */
+ return 0; /* No active PHYs */
debug_emac("davinci_eth_phy_detect(), ALIVE = 0x%08x\n", phy_act_state);
- for (i = 0; i < 32; i++) {
+ for (i = 0, j = 0; i < 32; i++)
if (phy_act_state & (1 << i)) {
- if (phy_act_state & ~(1 << i))
- return(0); /* More than one PHY */
- else {
- active_phy_addr = i;
- return(1);
- }
+ count++;
+ active_phy_addr[j++] = i;
}
- }
- return(0); /* Just to make GCC happy */
+ num_phy = count;
+
+ return count;
}
@@ -236,7 +242,18 @@ static int gen_is_phy_connected(int phy_addr)
{
u_int16_t dummy;
- return(davinci_eth_phy_read(phy_addr, MII_PHYSID1, &dummy));
+ return davinci_eth_phy_read(phy_addr, PHY_PHYIDR1, &dummy);
+}
+
+static int get_active_phy(void)
+{
+ int i;
+
+ for (i = 0; i < num_phy; i++)
+ if (phy[i].get_link_speed(active_phy_addr[i]))
+ return i;
+
+ return -1; /* Return error if no link */
}
static int gen_get_link_speed(int phy_addr)
@@ -362,6 +379,7 @@ static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
dv_reg_p addr;
u_int32_t clkdiv, cnt;
volatile emac_desc *rx_desc;
+ int index;
debug_emac("+ emac_open\n");
@@ -460,7 +478,8 @@ static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
/* We need to wait for MDIO to start */
udelay(1000);
- if (!phy.get_link_speed(active_phy_addr))
+ index = get_active_phy();
+ if (index == -1)
return(0);
emac_gigabit_enable();
@@ -559,12 +578,12 @@ static int davinci_eth_send_packet (struct eth_device *dev,
volatile void *packet, int length)
{
int ret_status = -1;
-
+ int index;
tx_send_loop = 0;
- /* Return error if no link */
- if (!phy.get_link_speed (active_phy_addr)) {
- printf ("WARN: emac_send_packet: No link\n");
+ index = get_active_phy();
+ if (index == -1) {
+ printf(" WARN: emac_send_packet: No link\n");
return (ret_status);
}
@@ -588,7 +607,7 @@ static int davinci_eth_send_packet (struct eth_device *dev,
/* Wait for packet to complete or link down */
while (1) {
- if (!phy.get_link_speed (active_phy_addr)) {
+ if (!phy[index].get_link_speed(active_phy_addr[index])) {
davinci_eth_ch_teardown (EMAC_CH_TX);
return (ret_status);
}
@@ -685,6 +704,7 @@ int davinci_emac_initialize(void)
u_int32_t phy_id;
u_int16_t tmp;
int i;
+ int ret;
struct eth_device *dev;
dev = malloc(sizeof *dev);
@@ -709,7 +729,7 @@ int davinci_emac_initialize(void)
for (i = 0; i < 256; i++) {
if (readl(&adap_mdio->ALIVE))
break;
- udelay(10);
+ udelay(1000);
}
if (i >= 256) {
@@ -717,57 +737,69 @@ int davinci_emac_initialize(void)
return(0);
}
- /* Find if a PHY is connected and get it's address */
- if (!davinci_eth_phy_detect())
+ /* Find if PHY(s) is/are connected */
+ ret = davinci_eth_phy_detect();
+ if (!ret)
return(0);
+ else
+ printf(" %d ETH PHY detected\n", ret);
/* Get PHY ID and initialize phy_ops for a detected PHY */
- if (!davinci_eth_phy_read(active_phy_addr, MII_PHYSID1, &tmp)) {
- active_phy_addr = 0xff;
- return(0);
- }
+ for (i = 0; i < num_phy; i++) {
+ if (!davinci_eth_phy_read(active_phy_addr[i], PHY_PHYIDR1,
+ &tmp)) {
+ active_phy_addr[i] = 0xff;
+ continue;
+ }
- phy_id = (tmp << 16) & 0xffff0000;
+ phy_id = (tmp << 16) & 0xffff0000;
- if (!davinci_eth_phy_read(active_phy_addr, MII_PHYSID2, &tmp)) {
- active_phy_addr = 0xff;
- return(0);
- }
+ if (!davinci_eth_phy_read(active_phy_addr[i], PHY_PHYIDR2,
+ &tmp)) {
+ active_phy_addr[i] = 0xff;
+ continue;
+ }
- phy_id |= tmp & 0x0000ffff;
+ phy_id |= tmp & 0x0000ffff;
- switch (phy_id) {
+ switch (phy_id) {
case PHY_LXT972:
- sprintf(phy.name, "LXT972 @ 0x%02x", active_phy_addr);
- phy.init = lxt972_init_phy;
- phy.is_phy_connected = lxt972_is_phy_connected;
- phy.get_link_speed = lxt972_get_link_speed;
- phy.auto_negotiate = lxt972_auto_negotiate;
+ sprintf(phy[i].name, "LXT972 @ 0x%02x",
+ active_phy_addr[i]);
+ phy[i].init = lxt972_init_phy;
+ phy[i].is_phy_connected = lxt972_is_phy_connected;
+ phy[i].get_link_speed = lxt972_get_link_speed;
+ phy[i].auto_negotiate = lxt972_auto_negotiate;
break;
case PHY_DP83848:
- sprintf(phy.name, "DP83848 @ 0x%02x", active_phy_addr);
- phy.init = dp83848_init_phy;
- phy.is_phy_connected = dp83848_is_phy_connected;
- phy.get_link_speed = dp83848_get_link_speed;
- phy.auto_negotiate = dp83848_auto_negotiate;
+ sprintf(phy[i].name, "DP83848 @ 0x%02x",
+ active_phy_addr[i]);
+ phy[i].init = dp83848_init_phy;
+ phy[i].is_phy_connected = dp83848_is_phy_connected;
+ phy[i].get_link_speed = dp83848_get_link_speed;
+ phy[i].auto_negotiate = dp83848_auto_negotiate;
break;
case PHY_ET1011C:
- sprintf(phy.name, "ET1011C @ 0x%02x", active_phy_addr);
- phy.init = gen_init_phy;
- phy.is_phy_connected = gen_is_phy_connected;
- phy.get_link_speed = et1011c_get_link_speed;
- phy.auto_negotiate = gen_auto_negotiate;
+ sprintf(phy[i].name, "ET1011C @ 0x%02x",
+ active_phy_addr[i]);
+ phy[i].init = gen_init_phy;
+ phy[i].is_phy_connected = gen_is_phy_connected;
+ phy[i].get_link_speed = et1011c_get_link_speed;
+ phy[i].auto_negotiate = gen_auto_negotiate;
break;
default:
- sprintf(phy.name, "GENERIC @ 0x%02x", active_phy_addr);
- phy.init = gen_init_phy;
- phy.is_phy_connected = gen_is_phy_connected;
- phy.get_link_speed = gen_get_link_speed;
- phy.auto_negotiate = gen_auto_negotiate;
- }
+ sprintf(phy[i].name, "GENERIC @ 0x%02x",
+ active_phy_addr[i]);
+ phy[i].init = gen_init_phy;
+ phy[i].is_phy_connected = gen_is_phy_connected;
+ phy[i].get_link_speed = gen_get_link_speed;
+ phy[i].auto_negotiate = gen_auto_negotiate;
+ }
- printf("Ethernet PHY: %s\n", phy.name);
+ printf("Ethernet PHY: %s\n", phy[i].name);
- miiphy_register(phy.name, davinci_mii_phy_read, davinci_mii_phy_write);
+ miiphy_register(phy[i].name, davinci_mii_phy_read,
+ davinci_mii_phy_write);
+ }
return(1);
}
--
1.6.2.4
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