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authorMike Frysinger <vapier@gentoo.org>2009-05-29 18:00:16 -0400
committerMike Frysinger <vapier@gentoo.org>2010-07-13 17:50:50 -0400
commit0c929426f8239f4cdf8a4f418596261353bfb455 (patch)
tree4442d351d2c6d353ca7e86860756387df7e7ebee /board/bf518f-ezbrd
parent9280c3f106968a44ba5721c72eba54db63704b2f (diff)
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Blackfin: bf518f-ezbrd: handle different PHYs dynamically
The original BF518F-EZBRD's have a Micrel KSZ8893 DSA on them, but newer ones only have a National PHY (which lack a RX Error interrupt line). So in the board eth init code, dynamically detect what is hooked up to the MAC and handle each accordingly. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'board/bf518f-ezbrd')
-rw-r--r--board/bf518f-ezbrd/bf518f-ezbrd.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/board/bf518f-ezbrd/bf518f-ezbrd.c b/board/bf518f-ezbrd/bf518f-ezbrd.c
index 85b350f..c2ab598 100644
--- a/board/bf518f-ezbrd/bf518f-ezbrd.c
+++ b/board/bf518f-ezbrd/bf518f-ezbrd.c
@@ -61,6 +61,7 @@ static void board_init_enetaddr(uchar *mac_addr)
#define KSZ_WRITE 0x02
#define KSZ_READ 0x03
+#define KSZ_REG_CHID 0x00 /* Register 0: Chip ID0 */
#define KSZ_REG_STPID 0x01 /* Register 1: Chip ID1 / Start Switch */
#define KSZ_REG_GC9 0x0b /* Register 11: Global Control 9 */
#define KSZ_REG_P3C0 0x30 /* Register 48: Port 3 Control 0 */
@@ -78,15 +79,17 @@ static int ksz8893m_reg_set(struct spi_slave *slave, uchar reg, uchar data)
return ksz8893m_transfer(slave, KSZ_WRITE, reg, data, din);
}
-static int ksz8893m_reg_clear(struct spi_slave *slave, uchar reg, uchar mask)
+static int ksz8893m_reg_read(struct spi_slave *slave, uchar reg)
{
- int ret = 0;
+ int ret;
unsigned char din[3];
+ ret = ksz8893m_transfer(slave, KSZ_READ, reg, 0, din);
+ return ret ? ret : din[2];
+}
- ret |= ksz8893m_transfer(slave, KSZ_READ, reg, 0, din);
- ret |= ksz8893m_reg_set(slave, reg, din[2] & mask);
-
- return ret;
+static int ksz8893m_reg_clear(struct spi_slave *slave, uchar reg, uchar mask)
+{
+ return ksz8893m_reg_set(slave, reg, ksz8893m_reg_read(slave, reg) & mask);
}
static int ksz8893m_reset(struct spi_slave *slave)
@@ -107,16 +110,16 @@ static int ksz8893m_reset(struct spi_slave *slave)
int board_eth_init(bd_t *bis)
{
- static bool switch_is_alive = false;
+ static bool switch_is_alive = false, phy_is_ksz = true;
int ret;
if (!switch_is_alive) {
struct spi_slave *slave = spi_setup_slave(0, 1, KSZ_MAX_HZ, SPI_MODE_3);
if (slave) {
if (!spi_claim_bus(slave)) {
- ret = ksz8893m_reset(slave);
- if (!ret)
- switch_is_alive = true;
+ phy_is_ksz = (ksz8893m_reg_read(slave, KSZ_REG_CHID) == 0x88);
+ ret = phy_is_ksz ? ksz8893m_reset(slave) : 0;
+ switch_is_alive = (ret == 0);
spi_release_bus(slave);
}
spi_free_slave(slave);