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net: dsa: felix: introduce support for Seville VSC9953 switch

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This is another switch from Vitesse / Microsemi / Microchip, that has
10 ports (8 external, 2 internal) and is integrated into the Freescale /
NXP T1040 PowerPC SoC. It is very similar to Felix from NXP LS1028A,
except that this is a platform device and Felix is a PCI device, and it
doesn't support IEEE 1588 and TSN.

Like Felix, this driver configures its own PCS on the internal MDIO bus
using a phy_device abstraction for it (yes, it will be refactored to use
a raw mdio_device, like other phylink drivers do, but let's keep it like
that for now). But unlike Felix, the MDIO bus and the PCS are not from
the same vendor. The PCS is the same QorIQ/Layerscape PCS as found in
Felix/ENETC/DPAA*, but the internal MDIO bus that is used to access it
is actually an instantiation of drivers/net/phy/mdio-mscc-miim.c. But it
would be difficult to reuse that driver (it doesn't even use regmap, and
it's less than 200 lines of code), so we hand-roll here some internal
MDIO bus accessors within seville_vsc9953.c, which serves the purpose of
driving the PCS absolutely fine.

Also, same as Felix, the PCS doesn't support dynamic reconfiguration of
SerDes protocol, so we need to do pre-validation of PHY mode from device
tree and not let phylink change it.

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxim Kochetkov
2020-07-13 19:57:10 +03:00
committed by David S. Miller
parent 375e131429
commit 84705fc165
6 changed files with 1149 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/net/dsa/ocelot/felix_vsc9959.c
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@@ -852,9 +852,9 @@ static void vsc9959_pcs_config_usxgmii(struct phy_device *pcs,
USXGMII_ADVERTISE_FDX);
}
static void vsc9959_pcs_config(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
const struct phylink_link_state *state)
void vsc9959_pcs_config(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
const struct phylink_link_state *state)
{
struct felix *felix = ocelot_to_felix(ocelot);
struct phy_device *pcs = felix->pcs[port];
@@ -965,10 +965,10 @@ static void vsc9959_pcs_link_up_2500basex(struct phy_device *pcs,
phy_clear_bits(pcs, MII_BMCR, BMCR_ANENABLE);
}
static void vsc9959_pcs_link_up(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
phy_interface_t interface,
int speed, int duplex)
void vsc9959_pcs_link_up(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
phy_interface_t interface,
int speed, int duplex)
{
struct felix *felix = ocelot_to_felix(ocelot);
struct phy_device *pcs = felix->pcs[port];
@@ -1096,8 +1096,8 @@ static void vsc9959_pcs_link_state_usxgmii(struct phy_device *pcs,
pcs->duplex = DUPLEX_HALF;
}
static void vsc9959_pcs_link_state(struct ocelot *ocelot, int port,
struct phylink_link_state *state)
void vsc9959_pcs_link_state(struct ocelot *ocelot, int port,
struct phylink_link_state *state)
{
struct felix *felix = ocelot_to_felix(ocelot);
struct phy_device *pcs = felix->pcs[port];
@@ -1286,7 +1286,7 @@ static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot)
return 0;
}
static void vsc9959_mdio_bus_free(struct ocelot *ocelot)
void vsc9959_mdio_bus_free(struct ocelot *ocelot)
{
struct felix *felix = ocelot_to_felix(ocelot);
int port;