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net: ksz9477: add support for KSZ9893 GbE switch

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Copy and tweak the required code from the linux kernel.
Only the KSZ9893 has been tested.

Signed-off-by: Karsten Wiese <karsten.wiese@protechna.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Karsten Wiese
2023-06-28 16:54:45 +02:00
committed by Tom Rini
parent 1196e5241d
commit 3ca4955760
1 changed files with 89 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
drivers/net/ksz9477.c
View File

@@ -16,6 +16,10 @@
#include <asm-generic/gpio.h>
/* Used with variable features to indicate capabilities. */
#define NEW_XMII BIT(1)
#define IS_9893 BIT(2)
/* Global registers */
/* Chip ID */
@@ -41,6 +45,13 @@
#define PORT_RMII_SEL 0x1
#define PORT_GMII_SEL 0x2
#define PORT_MII_SEL 0x3
/* S1 */
#define PORT_MII_1000MBIT_S1 BIT(6)
/* S1 */
#define PORT_MII_SEL_S1 0x0
#define PORT_RMII_SEL_S1 0x1
#define PORT_GMII_SEL_S1 0x2
#define PORT_RGMII_SEL_S1 0x3
/* Port MSTP State Register */
#define REG_PORT_MSTP_STATE 0x0b04
@@ -62,6 +73,8 @@
struct ksz_dsa_priv {
struct udevice *dev;
u32 features; /* chip specific features */
};
static inline int ksz_read8(struct udevice *dev, u32 reg, u8 *val)
@@ -284,6 +297,60 @@ U_BOOT_DRIVER(ksz_mdio) = {
.plat_auto = sizeof(struct mdio_perdev_priv),
};
static void ksz9477_set_gbit(struct ksz_dsa_priv *priv, bool gbit, u8 *data)
{
if (priv->features & NEW_XMII) {
if (gbit)
*data &= ~PORT_MII_NOT_1GBIT;
else
*data |= PORT_MII_NOT_1GBIT;
} else {
if (gbit)
*data |= PORT_MII_1000MBIT_S1;
else
*data &= ~PORT_MII_1000MBIT_S1;
}
}
static void ksz9477_set_xmii(struct ksz_dsa_priv *priv, int mode, u8 *data)
{
u8 xmii;
if (priv->features & NEW_XMII) {
switch (mode) {
case 0:
xmii = PORT_MII_SEL;
break;
case 1:
xmii = PORT_RMII_SEL;
break;
case 2:
xmii = PORT_GMII_SEL;
break;
default:
xmii = PORT_RGMII_SEL;
break;
}
} else {
switch (mode) {
case 0:
xmii = PORT_MII_SEL_S1;
break;
case 1:
xmii = PORT_RMII_SEL_S1;
break;
case 2:
xmii = PORT_GMII_SEL_S1;
break;
default:
xmii = PORT_RGMII_SEL_S1;
break;
}
}
*data &= ~PORT_MII_SEL_M;
*data |= xmii;
}
static int ksz_port_setup(struct udevice *dev, int port,
phy_interface_t interface)
{
@@ -293,9 +360,11 @@ static int ksz_port_setup(struct udevice *dev, int port,
dev_dbg(dev, "%s P%d %s\n", __func__, port + 1,
(port == pdata->cpu_port) ? "cpu" : "");
struct ksz_dsa_priv *priv = dev_get_priv(dev);
if (port != pdata->cpu_port) {
/* phy port: config errata and leds */
ksz_phy_errata_setup(dev, port);
if (priv->features & NEW_XMII)
/* phy port: config errata and leds */
ksz_phy_errata_setup(dev, port);
} else {
/* cpu port: configure MAC interface mode */
ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &data8);
@@ -303,24 +372,20 @@ static int ksz_port_setup(struct udevice *dev, int port,
phy_string_for_interface(interface));
switch (interface) {
case PHY_INTERFACE_MODE_MII:
data8 &= ~PORT_MII_SEL_M;
data8 |= PORT_MII_SEL;
data8 |= PORT_MII_NOT_1GBIT;
ksz9477_set_xmii(priv, 0, &data8);
ksz9477_set_gbit(priv, false, &data8);
break;
case PHY_INTERFACE_MODE_RMII:
data8 &= ~PORT_MII_SEL_M;
data8 |= PORT_RMII_SEL;
data8 |= PORT_MII_NOT_1GBIT;
ksz9477_set_xmii(priv, 1, &data8);
ksz9477_set_gbit(priv, false, &data8);
break;
case PHY_INTERFACE_MODE_GMII:
data8 &= ~PORT_MII_SEL_M;
data8 |= PORT_GMII_SEL;
data8 &= ~PORT_MII_NOT_1GBIT;
ksz9477_set_xmii(priv, 2, &data8);
ksz9477_set_gbit(priv, true, &data8);
break;
default:
data8 &= ~PORT_MII_SEL_M;
data8 |= PORT_RGMII_SEL;
data8 &= ~PORT_MII_NOT_1GBIT;
ksz9477_set_xmii(priv, 3, &data8);
ksz9477_set_gbit(priv, true, &data8);
data8 &= ~PORT_RGMII_ID_IG_ENABLE;
data8 &= ~PORT_RGMII_ID_EG_ENABLE;
if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
@@ -329,6 +394,8 @@ static int ksz_port_setup(struct udevice *dev, int port,
if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
interface == PHY_INTERFACE_MODE_RGMII_TXID)
data8 |= PORT_RGMII_ID_EG_ENABLE;
if (priv->features & IS_9893)
data8 &= ~PORT_MII_MAC_MODE;
break;
}
ksz_write8(dev, PORT_CTRL_ADDR(port, REG_PORT_XMII_CTRL_1), data8);
@@ -479,10 +546,17 @@ static int ksz_i2c_probe(struct udevice *dev)
case 0x00989700:
puts("KSZ9897S: ");
break;
case 0x00989300:
puts("KSZ9893R: ");
break;
default:
dev_err(dev, "invalid chip id: 0x%08x\n", id);
return -EINVAL;
}
if ((id & 0xf00) == 0x300)
priv->features |= IS_9893;
else
priv->features |= NEW_XMII;
/* probe mdio bus */
ret = ksz_probe_mdio(dev);
@@ -503,6 +577,7 @@ static const struct udevice_id ksz_i2c_ids[] = {
{ .compatible = "microchip,ksz9897" },
{ .compatible = "microchip,ksz9477" },
{ .compatible = "microchip,ksz9567" },
{ .compatible = "microchip,ksz9893" },
{ }
};