forked from Openwrt/openwrt
86dadeba48
Backport patch merged upstream adding quirk for SFP GPON-ONU-34-20BI. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
100 lines
2.3 KiB
Diff
100 lines
2.3 KiB
Diff
From 3cb0bde365d913c484d20224367a54a0eac780a7 Mon Sep 17 00:00:00 2001
|
|
From: Antoine Tenart <antoine.tenart@bootlin.com>
|
|
Date: Fri, 21 Feb 2020 11:55:29 +0100
|
|
Subject: [PATCH 3/3] net: phy: sfp: add support for SMBus
|
|
|
|
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
|
|
---
|
|
drivers/net/phy/sfp.c | 68 ++++++++++++++++++++++++++++++++++---------
|
|
1 file changed, 54 insertions(+), 14 deletions(-)
|
|
|
|
--- a/drivers/net/phy/sfp.c
|
|
+++ b/drivers/net/phy/sfp.c
|
|
@@ -556,32 +556,72 @@ static int sfp_i2c_write(struct sfp *sfp
|
|
return ret == ARRAY_SIZE(msgs) ? len : 0;
|
|
}
|
|
|
|
+static int sfp_smbus_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf,
|
|
+ size_t len)
|
|
+{
|
|
+ u8 bus_addr = a2 ? 0x51 : 0x50, *val = buf;
|
|
+
|
|
+ bus_addr -= 0x40;
|
|
+
|
|
+ while (len > 0) {
|
|
+ *val = sfp->i2c_mii->read(sfp->i2c_mii, bus_addr, dev_addr);
|
|
+
|
|
+ val++;
|
|
+ dev_addr++;
|
|
+ len--;
|
|
+ }
|
|
+
|
|
+ return val - (u8 *)buf;
|
|
+}
|
|
+
|
|
+static int sfp_smbus_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf,
|
|
+ size_t len)
|
|
+{
|
|
+ u8 bus_addr = a2 ? 0x51 : 0x50;
|
|
+ u16 val;
|
|
+
|
|
+ memcpy(&val, buf, len);
|
|
+
|
|
+ return sfp->i2c_mii->write(sfp->i2c_mii, bus_addr, dev_addr, val);
|
|
+}
|
|
+
|
|
static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c)
|
|
{
|
|
- struct mii_bus *i2c_mii;
|
|
+ struct mii_bus *mii;
|
|
int ret;
|
|
|
|
- if (!i2c_check_functionality(i2c, I2C_FUNC_I2C))
|
|
- return -EINVAL;
|
|
-
|
|
sfp->i2c = i2c;
|
|
- sfp->read = sfp_i2c_read;
|
|
- sfp->write = sfp_i2c_write;
|
|
|
|
- i2c_mii = mdio_i2c_alloc(sfp->dev, i2c);
|
|
- if (IS_ERR(i2c_mii))
|
|
- return PTR_ERR(i2c_mii);
|
|
+ if (i2c_check_functionality(i2c, I2C_FUNC_I2C)) {
|
|
+ sfp->read = sfp_i2c_read;
|
|
+ sfp->write = sfp_i2c_write;
|
|
+
|
|
+ mii = mdio_i2c_alloc(sfp->dev, i2c);
|
|
+ if (IS_ERR(mii))
|
|
+ return PTR_ERR(mii);
|
|
+
|
|
+ mii->name = "SFP I2C Bus";
|
|
+ } else if (i2c_check_functionality(i2c, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
|
+ sfp->read = sfp_smbus_read;
|
|
+ sfp->write = sfp_smbus_write;
|
|
+
|
|
+ mii = mdio_smbus_alloc(sfp->dev, i2c);
|
|
+ if (IS_ERR(mii))
|
|
+ return PTR_ERR(mii);
|
|
|
|
- i2c_mii->name = "SFP I2C Bus";
|
|
- i2c_mii->phy_mask = ~0;
|
|
+ mii->name = "SFP SMBus";
|
|
+ } else {
|
|
+ return -EINVAL;
|
|
+ }
|
|
|
|
- ret = mdiobus_register(i2c_mii);
|
|
+ mii->phy_mask = ~0;
|
|
+ ret = mdiobus_register(mii);
|
|
if (ret < 0) {
|
|
- mdiobus_free(i2c_mii);
|
|
+ mdiobus_free(mii);
|
|
return ret;
|
|
}
|
|
|
|
- sfp->i2c_mii = i2c_mii;
|
|
+ sfp->i2c_mii = mii;
|
|
|
|
return 0;
|
|
}
|