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Message-Id: <20240228225400.3509156-4-justin.chen@broadcom.com>
Date: Wed, 28 Feb 2024 14:53:57 -0800
From: Justin Chen <justin.chen@...adcom.com>
To: netdev@...r.kernel.org
Cc: horms@...nel.org,
bcm-kernel-feedback-list@...adcom.com,
florian.fainelli@...adcom.com,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org,
conor+dt@...nel.org,
opendmb@...il.com,
andrew@...n.ch,
hkallweit1@...il.com,
linux@...linux.org.uk,
rafal@...ecki.pl,
devicetree@...r.kernel.org,
Justin Chen <justin.chen@...adcom.com>
Subject: [PATCH net-next v3 3/6] net: bcmasp: Add support for ASP 2.2
ASP 2.2 improves power savings during low power modes.
A new register was added to toggle to a slower clock during low
power modes.
EEE was broken for ASP 2.0/2.1. A HW workaround was added for
ASP 2.2 that requires toggling a chicken bit.
Signed-off-by: Justin Chen <justin.chen@...adcom.com>
Acked-by: Florian Fainelli <florian.fainelli@...adcom.com>
---
drivers/net/ethernet/broadcom/asp2/bcmasp.c | 73 +++++++++++++++++--
drivers/net/ethernet/broadcom/asp2/bcmasp.h | 18 ++++-
.../net/ethernet/broadcom/asp2/bcmasp_intf.c | 6 ++
3 files changed, 87 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
index 80245c65cc90..100c69f3307a 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
@@ -972,7 +972,26 @@ static void bcmasp_core_init(struct bcmasp_priv *priv)
ASP_INTR2_CLEAR);
}
-static void bcmasp_core_clock_select(struct bcmasp_priv *priv, bool slow)
+static void bcmasp_core_clock_select_many(struct bcmasp_priv *priv, bool slow)
+{
+ u32 reg;
+
+ reg = ctrl2_core_rl(priv, ASP_CTRL2_CORE_CLOCK_SELECT);
+ if (slow)
+ reg &= ~ASP_CTRL2_CORE_CLOCK_SELECT_MAIN;
+ else
+ reg |= ASP_CTRL2_CORE_CLOCK_SELECT_MAIN;
+ ctrl2_core_wl(priv, reg, ASP_CTRL2_CORE_CLOCK_SELECT);
+
+ reg = ctrl2_core_rl(priv, ASP_CTRL2_CPU_CLOCK_SELECT);
+ if (slow)
+ reg &= ~ASP_CTRL2_CPU_CLOCK_SELECT_MAIN;
+ else
+ reg |= ASP_CTRL2_CPU_CLOCK_SELECT_MAIN;
+ ctrl2_core_wl(priv, reg, ASP_CTRL2_CPU_CLOCK_SELECT);
+}
+
+static void bcmasp_core_clock_select_one(struct bcmasp_priv *priv, bool slow)
{
u32 reg;
@@ -1166,6 +1185,24 @@ static void bcmasp_wol_irq_destroy_per_intf(struct bcmasp_priv *priv)
}
}
+static void bcmasp_eee_fixup(struct bcmasp_intf *intf, bool en)
+{
+ u32 reg, phy_lpi_overwrite;
+
+ reg = rx_edpkt_core_rl(intf->parent, ASP_EDPKT_SPARE_REG);
+ phy_lpi_overwrite = intf->internal_phy ? ASP_EDPKT_SPARE_REG_EPHY_LPI :
+ ASP_EDPKT_SPARE_REG_GPHY_LPI;
+
+ if (en)
+ reg |= phy_lpi_overwrite;
+ else
+ reg &= ~phy_lpi_overwrite;
+
+ rx_edpkt_core_wl(intf->parent, reg, ASP_EDPKT_SPARE_REG);
+
+ usleep_range(50, 100);
+}
+
static struct bcmasp_hw_info v20_hw_info = {
.rx_ctrl_flush = ASP_RX_CTRL_FLUSH,
.umac2fb = UMAC2FB_OFFSET,
@@ -1178,6 +1215,7 @@ static const struct bcmasp_plat_data v20_plat_data = {
.init_wol = bcmasp_init_wol_per_intf,
.enable_wol = bcmasp_enable_wol_per_intf,
.destroy_wol = bcmasp_wol_irq_destroy_per_intf,
+ .core_clock_select = bcmasp_core_clock_select_one,
.hw_info = &v20_hw_info,
};
@@ -1194,17 +1232,39 @@ static const struct bcmasp_plat_data v21_plat_data = {
.init_wol = bcmasp_init_wol_shared,
.enable_wol = bcmasp_enable_wol_shared,
.destroy_wol = bcmasp_wol_irq_destroy_shared,
+ .core_clock_select = bcmasp_core_clock_select_one,
.hw_info = &v21_hw_info,
};
+static const struct bcmasp_plat_data v22_plat_data = {
+ .init_wol = bcmasp_init_wol_shared,
+ .enable_wol = bcmasp_enable_wol_shared,
+ .destroy_wol = bcmasp_wol_irq_destroy_shared,
+ .core_clock_select = bcmasp_core_clock_select_many,
+ .hw_info = &v21_hw_info,
+ .eee_fixup = bcmasp_eee_fixup,
+};
+
+static void bcmasp_set_pdata(struct bcmasp_priv *priv, const struct bcmasp_plat_data *pdata)
+{
+ priv->init_wol = pdata->init_wol;
+ priv->enable_wol = pdata->enable_wol;
+ priv->destroy_wol = pdata->destroy_wol;
+ priv->core_clock_select = pdata->core_clock_select;
+ priv->eee_fixup = pdata->eee_fixup;
+ priv->hw_info = pdata->hw_info;
+}
+
static const struct of_device_id bcmasp_of_match[] = {
{ .compatible = "brcm,asp-v2.0", .data = &v20_plat_data },
{ .compatible = "brcm,asp-v2.1", .data = &v21_plat_data },
+ { .compatible = "brcm,asp-v2.2", .data = &v22_plat_data },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, bcmasp_of_match);
static const struct of_device_id bcmasp_mdio_of_match[] = {
+ { .compatible = "brcm,asp-v2.2-mdio", },
{ .compatible = "brcm,asp-v2.1-mdio", },
{ .compatible = "brcm,asp-v2.0-mdio", },
{ /* sentinel */ },
@@ -1265,16 +1325,13 @@ static int bcmasp_probe(struct platform_device *pdev)
if (!pdata)
return dev_err_probe(dev, -EINVAL, "unable to find platform data\n");
- priv->init_wol = pdata->init_wol;
- priv->enable_wol = pdata->enable_wol;
- priv->destroy_wol = pdata->destroy_wol;
- priv->hw_info = pdata->hw_info;
+ bcmasp_set_pdata(priv, pdata);
/* Enable all clocks to ensure successful probing */
bcmasp_core_clock_set(priv, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE, 0);
/* Switch to the main clock */
- bcmasp_core_clock_select(priv, false);
+ priv->core_clock_select(priv, false);
bcmasp_intr2_mask_set_all(priv);
bcmasp_intr2_clear_all(priv);
@@ -1381,7 +1438,7 @@ static int __maybe_unused bcmasp_suspend(struct device *d)
*/
bcmasp_core_clock_set(priv, 0, ASP_CTRL_CLOCK_CTRL_ASP_TX_DISABLE);
- bcmasp_core_clock_select(priv, true);
+ priv->core_clock_select(priv, true);
clk_disable_unprepare(priv->clk);
@@ -1399,7 +1456,7 @@ static int __maybe_unused bcmasp_resume(struct device *d)
return ret;
/* Switch to the main clock domain */
- bcmasp_core_clock_select(priv, false);
+ priv->core_clock_select(priv, false);
/* Re-enable all clocks for re-initialization */
bcmasp_core_clock_set(priv, ASP_CTRL_CLOCK_CTRL_ASP_ALL_DISABLE, 0);
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.h b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
index 312bf9b6576e..61598dc070b1 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.h
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
@@ -33,6 +33,12 @@
#define ASP_WAKEUP_INTR2_FILT_1 BIT(3)
#define ASP_WAKEUP_INTR2_FW BIT(4)
+#define ASP_CTRL2_OFFSET 0x2000
+#define ASP_CTRL2_CORE_CLOCK_SELECT 0x0
+#define ASP_CTRL2_CORE_CLOCK_SELECT_MAIN BIT(0)
+#define ASP_CTRL2_CPU_CLOCK_SELECT 0x4
+#define ASP_CTRL2_CPU_CLOCK_SELECT_MAIN BIT(0)
+
#define ASP_TX_ANALYTICS_OFFSET 0x4c000
#define ASP_TX_ANALYTICS_CTRL 0x0
@@ -134,8 +140,11 @@ enum asp_rx_net_filter_block {
#define ASP_EDPKT_RX_PKT_CNT 0x138
#define ASP_EDPKT_HDR_EXTR_CNT 0x13c
#define ASP_EDPKT_HDR_OUT_CNT 0x140
+#define ASP_EDPKT_SPARE_REG 0x174
+#define ASP_EDPKT_SPARE_REG_EPHY_LPI BIT(4)
+#define ASP_EDPKT_SPARE_REG_GPHY_LPI BIT(3)
-#define ASP_CTRL 0x101000
+#define ASP_CTRL_OFFSET 0x101000
#define ASP_CTRL_ASP_SW_INIT 0x04
#define ASP_CTRL_ASP_SW_INIT_ACPUSS_CORE BIT(0)
#define ASP_CTRL_ASP_SW_INIT_ASP_TX BIT(1)
@@ -372,6 +381,8 @@ struct bcmasp_plat_data {
void (*init_wol)(struct bcmasp_priv *priv);
void (*enable_wol)(struct bcmasp_intf *intf, bool en);
void (*destroy_wol)(struct bcmasp_priv *priv);
+ void (*core_clock_select)(struct bcmasp_priv *priv, bool slow);
+ void (*eee_fixup)(struct bcmasp_intf *priv, bool en);
struct bcmasp_hw_info *hw_info;
};
@@ -390,6 +401,8 @@ struct bcmasp_priv {
void (*init_wol)(struct bcmasp_priv *priv);
void (*enable_wol)(struct bcmasp_intf *intf, bool en);
void (*destroy_wol)(struct bcmasp_priv *priv);
+ void (*core_clock_select)(struct bcmasp_priv *priv, bool slow);
+ void (*eee_fixup)(struct bcmasp_intf *intf, bool en);
void __iomem *base;
struct bcmasp_hw_info *hw_info;
@@ -530,7 +543,8 @@ BCMASP_CORE_IO_MACRO(rx_analytics, ASP_RX_ANALYTICS_OFFSET);
BCMASP_CORE_IO_MACRO(rx_ctrl, ASP_RX_CTRL_OFFSET);
BCMASP_CORE_IO_MACRO(rx_filter, ASP_RX_FILTER_OFFSET);
BCMASP_CORE_IO_MACRO(rx_edpkt, ASP_EDPKT_OFFSET);
-BCMASP_CORE_IO_MACRO(ctrl, ASP_CTRL);
+BCMASP_CORE_IO_MACRO(ctrl, ASP_CTRL_OFFSET);
+BCMASP_CORE_IO_MACRO(ctrl2, ASP_CTRL2_OFFSET);
struct bcmasp_intf *bcmasp_interface_create(struct bcmasp_priv *priv,
struct device_node *ndev_dn, int i);
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
index e429876c7291..36e6fae937ea 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
@@ -1333,6 +1333,9 @@ static void bcmasp_suspend_to_wol(struct bcmasp_intf *intf)
ASP_WAKEUP_INTR2_MASK_CLEAR);
}
+ if (intf->eee.eee_enabled && intf->parent->eee_fixup)
+ intf->parent->eee_fixup(intf, true);
+
netif_dbg(intf, wol, ndev, "entered WOL mode\n");
}
@@ -1381,6 +1384,9 @@ static void bcmasp_resume_from_wol(struct bcmasp_intf *intf)
{
u32 reg;
+ if (intf->eee.eee_enabled && intf->parent->eee_fixup)
+ intf->parent->eee_fixup(intf, false);
+
reg = umac_rl(intf, UMC_MPD_CTRL);
reg &= ~UMC_MPD_CTRL_MPD_EN;
umac_wl(intf, reg, UMC_MPD_CTRL);
--
2.34.1
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