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net: phy: aquantia: wait for phy init sequence to finish

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Aquantia quad-phys may take longer to initialize. This commit adds
a polling mechanism for a global alarm bit that tells if phy init
sequence is completed.

Signed-off-by: Florin Chiculita <florinlaurentiu.chiculita@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Florin Chiculita 2019-10-14 17:27:07 +03:00 committed by Joe Hershberger
parent 7c56408be6
commit bf58916373
1 changed files with 15 additions and 0 deletions
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15
drivers/net/phy/aquantia.c
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@ -37,6 +37,9 @@
#define GLOBAL_FAULT 0xc850
#define GLOBAL_RSTATUS_1 0xc885
#define GLOBAL_ALARM_1 0xcc00
#define SYSTEM_READY_BIT 0x40
#define GLOBAL_STANDARD_CONTROL 0x0
#define SOFT_RESET BIT(15)
#define LOW_POWER BIT(11)
@ -258,6 +261,18 @@ int aquantia_config(struct phy_device *phydev)
{
u32 val, id, rstatus, fault;
u32 reg_val1 = 0;
int num_retries = 5;
/*
* check if the system is out of reset and init sequence completed.
* chip-wide reset for gen1 quad phys takes longer
*/
while (--num_retries) {
rstatus = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_ALARM_1);
if (rstatus & SYSTEM_READY_BIT)
break;
mdelay(10);
}
id = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_FIRMWARE_ID);
rstatus = phy_read(phydev, MDIO_MMD_VEND1, GLOBAL_RSTATUS_1);