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phy: mvebu-cp110-comphy: Add SMC call support 

Keep the exact same list of supported configurations but first try to
use the firmware's implementation. If it fails, try the legacy method:
Linux implementation.

Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
[miquel.raynal@bootlin.com: adapt the content to the mainline driver]
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Grzegorz Jaszczyk 2019-07-31 14:21:10 +02:00 committed by Kishon Vijay Abraham I
parent d4eda9d847
commit eb6a1fcb53
2 changed files with 177 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/phy/marvell/Kconfig
View File

@ -57,6 +57,7 @@ config PHY_MVEBU_CP110_COMPHY
tristate "Marvell CP110 comphy driver"
depends on ARCH_MVEBU || COMPILE_TEST
depends on OF
depends on HAVE_ARM_SMCCC
select GENERIC_PHY
help
This driver allows to control the comphy, an hardware block providing

198
drivers/phy/marvell/phy-mvebu-cp110-comphy.c
View File

@ -5,6 +5,7 @@
* Antoine Tenart <antoine.tenart@free-electrons.com>
*/
#include <linux/arm-smccc.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/iopoll.h>
@ -116,45 +117,89 @@
#define MVEBU_COMPHY_LANES 6
#define MVEBU_COMPHY_PORTS 3
#define COMPHY_SIP_POWER_ON 0x82000001
#define COMPHY_SIP_POWER_OFF 0x82000002
#define COMPHY_FW_NOT_SUPPORTED (-1)
/*
* A lane is described by the following bitfields:
* [ 1- 0]: COMPHY polarity invertion
* [ 2- 7]: COMPHY speed
* [ 5-11]: COMPHY port index
* [12-16]: COMPHY mode
* [17]: Clock source
*/
#define COMPHY_FW_POL_OFFSET 0
#define COMPHY_FW_POL_MASK GENMASK(1, 0)
#define COMPHY_FW_SPEED_OFFSET 2
#define COMPHY_FW_SPEED_MASK GENMASK(7, 2)
#define COMPHY_FW_SPEED_MAX COMPHY_FW_SPEED_MASK
#define COMPHY_FW_SPEED_1250 0
#define COMPHY_FW_SPEED_3125 2
#define COMPHY_FW_SPEED_5000 3
#define COMPHY_FW_SPEED_103125 6
#define COMPHY_FW_PORT_OFFSET 8
#define COMPHY_FW_PORT_MASK GENMASK(11, 8)
#define COMPHY_FW_MODE_OFFSET 12
#define COMPHY_FW_MODE_MASK GENMASK(16, 12)
#define COMPHY_FW_PARAM_FULL(mode, port, speed, pol) \
((((pol) << COMPHY_FW_POL_OFFSET) & COMPHY_FW_POL_MASK) | \
(((mode) << COMPHY_FW_MODE_OFFSET) & COMPHY_FW_MODE_MASK) | \
(((port) << COMPHY_FW_PORT_OFFSET) & COMPHY_FW_PORT_MASK) | \
(((speed) << COMPHY_FW_SPEED_OFFSET) & COMPHY_FW_SPEED_MASK))
#define COMPHY_FW_PARAM(mode, port) \
COMPHY_FW_PARAM_FULL(mode, port, 0, 0)
#define COMPHY_FW_PARAM_ETH(mode, port, speed) \
COMPHY_FW_PARAM_FULL(mode, port, speed, 0)
#define COMPHY_FW_MODE_SGMII 0x2 /* SGMII 1G */
#define COMPHY_FW_MODE_HS_SGMII 0x3 /* SGMII 2.5G */
#define COMPHY_FW_MODE_XFI 0x8 /* SFI: 0x9 (is treated like XFI) */
struct mvebu_comphy_conf {
enum phy_mode mode;
int submode;
unsigned lane;
unsigned port;
u32 mux;
u32 fw_mode;
};
#define MVEBU_COMPHY_CONF(_lane, _port, _submode, _mux) \
#define MVEBU_COMPHY_CONF(_lane, _port, _submode, _mux, _fw) \
{ \
.lane = _lane, \
.port = _port, \
.mode = PHY_MODE_ETHERNET, \
.submode = _submode, \
.mux = _mux, \
.fw_mode = _fw, \
}
static const struct mvebu_comphy_conf mvebu_comphy_cp110_modes[] = {
/* lane 0 */
MVEBU_COMPHY_CONF(0, 1, PHY_INTERFACE_MODE_SGMII, 0x1),
MVEBU_COMPHY_CONF(0, 1, PHY_INTERFACE_MODE_2500BASEX, 0x1),
MVEBU_COMPHY_CONF(0, 1, PHY_INTERFACE_MODE_SGMII, 0x1, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(0, 1, PHY_INTERFACE_MODE_2500BASEX, 0x1, COMPHY_FW_MODE_HS_SGMII),
/* lane 1 */
MVEBU_COMPHY_CONF(1, 2, PHY_INTERFACE_MODE_SGMII, 0x1),
MVEBU_COMPHY_CONF(1, 2, PHY_INTERFACE_MODE_2500BASEX, 0x1),
MVEBU_COMPHY_CONF(1, 2, PHY_INTERFACE_MODE_SGMII, 0x1, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(1, 2, PHY_INTERFACE_MODE_2500BASEX, 0x1, COMPHY_FW_MODE_HS_SGMII),
/* lane 2 */
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_SGMII, 0x1),
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_2500BASEX, 0x1),
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_10GKR, 0x1),
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_SGMII, 0x1, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_2500BASEX, 0x1, COMPHY_FW_MODE_HS_SGMII),
MVEBU_COMPHY_CONF(2, 0, PHY_INTERFACE_MODE_10GKR, 0x1, COMPHY_FW_MODE_XFI),
/* lane 3 */
MVEBU_COMPHY_CONF(3, 1, PHY_INTERFACE_MODE_SGMII, 0x2),
MVEBU_COMPHY_CONF(3, 1, PHY_INTERFACE_MODE_2500BASEX, 0x2),
MVEBU_COMPHY_CONF(3, 1, PHY_INTERFACE_MODE_SGMII, 0x2, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(3, 1, PHY_INTERFACE_MODE_2500BASEX, 0x2, COMPHY_FW_MODE_HS_SGMII),
/* lane 4 */
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_SGMII, 0x2),
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_2500BASEX, 0x2),
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_10GKR, 0x2),
MVEBU_COMPHY_CONF(4, 1, PHY_INTERFACE_MODE_SGMII, 0x1),
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_SGMII, 0x2, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_2500BASEX, 0x2, COMPHY_FW_MODE_HS_SGMII),
MVEBU_COMPHY_CONF(4, 0, PHY_INTERFACE_MODE_10GKR, 0x2, COMPHY_FW_MODE_XFI),
MVEBU_COMPHY_CONF(4, 1, PHY_INTERFACE_MODE_SGMII, 0x1, COMPHY_FW_MODE_SGMII),
/* lane 5 */
MVEBU_COMPHY_CONF(5, 2, PHY_INTERFACE_MODE_SGMII, 0x1),
MVEBU_COMPHY_CONF(5, 2, PHY_INTERFACE_MODE_2500BASEX, 0x1),
MVEBU_COMPHY_CONF(5, 2, PHY_INTERFACE_MODE_SGMII, 0x1, COMPHY_FW_MODE_SGMII),
MVEBU_COMPHY_CONF(5, 2, PHY_INTERFACE_MODE_2500BASEX, 0x1, COMPHY_FW_MODE_HS_SGMII),
};
struct mvebu_comphy_priv {
@ -164,6 +209,7 @@ struct mvebu_comphy_priv {
struct clk *mg_domain_clk;
struct clk *mg_core_clk;
struct clk *axi_clk;
unsigned long cp_phys;
};
struct mvebu_comphy_lane {
@ -174,8 +220,18 @@ struct mvebu_comphy_lane {
int port;
};
static int mvebu_comphy_get_mux(int lane, int port,
enum phy_mode mode, int submode)
static int mvebu_comphy_smc(unsigned long function, unsigned long phys,
unsigned long lane, unsigned long mode)
{
struct arm_smccc_res res;
arm_smccc_smc(function, phys, lane, mode, 0, 0, 0, 0, &res);
return res.a0;
}
static int mvebu_comphy_get_mode(bool fw_mode, int lane, int port,
enum phy_mode mode, int submode)
{
int i, n = ARRAY_SIZE(mvebu_comphy_cp110_modes);
@ -194,7 +250,22 @@ static int mvebu_comphy_get_mux(int lane, int port,
if (i == n)
return -EINVAL;
return mvebu_comphy_cp110_modes[i].mux;
if (fw_mode)
return mvebu_comphy_cp110_modes[i].fw_mode;
else
return mvebu_comphy_cp110_modes[i].mux;
}
static inline int mvebu_comphy_get_mux(int lane, int port,
enum phy_mode mode, int submode)
{
return mvebu_comphy_get_mode(false, lane, port, mode, submode);
}
static inline int mvebu_comphy_get_fw_mode(int lane, int port,
enum phy_mode mode, int submode)
{
return mvebu_comphy_get_mode(true, lane, port, mode, submode);
}
static void mvebu_comphy_ethernet_init_reset(struct mvebu_comphy_lane *lane)
@ -480,7 +551,7 @@ static int mvebu_comphy_set_mode_10gkr(struct phy *phy)
return mvebu_comphy_init_plls(lane);
}
static int mvebu_comphy_power_on(struct phy *phy)
static int mvebu_comphy_power_on_legacy(struct phy *phy)
{
struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
struct mvebu_comphy_priv *priv = lane->priv;
@ -521,6 +592,68 @@ static int mvebu_comphy_power_on(struct phy *phy)
return ret;
}
static int mvebu_comphy_power_on(struct phy *phy)
{
struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
struct mvebu_comphy_priv *priv = lane->priv;
int fw_mode, fw_speed;
u32 fw_param = 0;
int ret;
fw_mode = mvebu_comphy_get_fw_mode(lane->id, lane->port,
lane->mode, lane->submode);
if (fw_mode < 0)
goto try_legacy;
/* Try SMC flow first */
switch (lane->mode) {
case PHY_MODE_ETHERNET:
switch (lane->submode) {
case PHY_INTERFACE_MODE_SGMII:
dev_dbg(priv->dev, "set lane %d to 1000BASE-X mode\n",
lane->id);
fw_speed = COMPHY_FW_SPEED_1250;
break;
case PHY_INTERFACE_MODE_2500BASEX:
dev_dbg(priv->dev, "set lane %d to 2500BASE-X mode\n",
lane->id);
fw_speed = COMPHY_FW_SPEED_3125;
break;
case PHY_INTERFACE_MODE_10GKR:
dev_dbg(priv->dev, "set lane %d to 10G-KR mode\n",
lane->id);
fw_speed = COMPHY_FW_SPEED_103125;
break;
default:
dev_err(priv->dev, "unsupported Ethernet mode (%d)\n",
lane->submode);
return -ENOTSUPP;
}
fw_param = COMPHY_FW_PARAM_ETH(fw_mode, lane->port, fw_speed);
break;
default:
dev_err(priv->dev, "unsupported PHY mode (%d)\n", lane->mode);
return -ENOTSUPP;
}
ret = mvebu_comphy_smc(COMPHY_SIP_POWER_ON, priv->cp_phys, lane->id,
fw_param);
if (!ret)
return ret;
if (ret == COMPHY_FW_NOT_SUPPORTED)
dev_err(priv->dev,
"unsupported SMC call, try updating your firmware\n");
dev_warn(priv->dev,
"Firmware could not configure PHY %d with mode %d (ret: %d), trying legacy method\n",
lane->id, lane->mode, ret);
try_legacy:
/* Fallback to Linux's implementation */
return mvebu_comphy_power_on_legacy(phy);
}
static int mvebu_comphy_set_mode(struct phy *phy,
enum phy_mode mode, int submode)
{
@ -532,7 +665,7 @@ static int mvebu_comphy_set_mode(struct phy *phy,
if (submode == PHY_INTERFACE_MODE_1000BASEX)
submode = PHY_INTERFACE_MODE_SGMII;
if (mvebu_comphy_get_mux(lane->id, lane->port, mode, submode) < 0)
if (mvebu_comphy_get_fw_mode(lane->id, lane->port, mode, submode) < 0)
return -EINVAL;
lane->mode = mode;
@ -540,7 +673,7 @@ static int mvebu_comphy_set_mode(struct phy *phy,
return 0;
}
static int mvebu_comphy_power_off(struct phy *phy)
static int mvebu_comphy_power_off_legacy(struct phy *phy)
{
struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
struct mvebu_comphy_priv *priv = lane->priv;
@ -563,6 +696,21 @@ static int mvebu_comphy_power_off(struct phy *phy)
return 0;
}
static int mvebu_comphy_power_off(struct phy *phy)
{
struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
struct mvebu_comphy_priv *priv = lane->priv;
int ret;
ret = mvebu_comphy_smc(COMPHY_SIP_POWER_OFF, priv->cp_phys,
lane->id, 0);
if (!ret)
return ret;
/* Fallback to Linux's implementation */
return mvebu_comphy_power_off_legacy(phy);
}
static const struct phy_ops mvebu_comphy_ops = {
.power_on = mvebu_comphy_power_on,
.power_off = mvebu_comphy_power_off,
@ -682,6 +830,12 @@ static int mvebu_comphy_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "cannot initialize clocks\n");
}
/*
* Hack to retrieve a physical offset relative to this CP that will be
* given to the firmware
*/
priv->cp_phys = res->start;
for_each_available_child_of_node(pdev->dev.of_node, child) {
struct mvebu_comphy_lane *lane;
struct phy *phy;