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-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-mac.c24
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-mac.h1
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-phy.c3
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-sgmii.c175
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-sgmii.h16
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac.c10
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac.h4
7 files changed, 166 insertions, 67 deletions
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
index e4793d703ed9..b991219862b1 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -103,14 +103,6 @@
#define RXEN 0x00000002
#define TXEN 0x00000001
-
-/* EMAC_WOL_CTRL0 */
-#define LK_CHG_PME 0x20
-#define LK_CHG_EN 0x10
-#define MG_FRAME_PME 0x8
-#define MG_FRAME_EN 0x4
-#define WK_FRAME_EN 0x1
-
/* EMAC_DESC_CTRL_3 */
#define RFD_RING_SIZE_BMSK 0xfff
@@ -556,7 +548,7 @@ void emac_mac_reset(struct emac_adapter *adpt)
emac_reg_update32(adpt->base + EMAC_DMA_MAS_CTRL, 0, INT_RD_CLR_EN);
}
-void emac_mac_start(struct emac_adapter *adpt)
+static void emac_mac_start(struct emac_adapter *adpt)
{
struct phy_device *phydev = adpt->phydev;
u32 mac, csr1;
@@ -619,8 +611,6 @@ void emac_mac_start(struct emac_adapter *adpt)
emac_reg_update32(adpt->base + EMAC_ATHR_HEADER_CTRL,
(HEADER_ENABLE | HEADER_CNT_EN), 0);
-
- emac_reg_update32(adpt->csr + EMAC_EMAC_WRAPPER_CSR2, 0, WOL_EN);
}
void emac_mac_stop(struct emac_adapter *adpt)
@@ -961,12 +951,16 @@ static void emac_mac_rx_descs_refill(struct emac_adapter *adpt,
static void emac_adjust_link(struct net_device *netdev)
{
struct emac_adapter *adpt = netdev_priv(netdev);
+ struct emac_sgmii *sgmii = &adpt->phy;
struct phy_device *phydev = netdev->phydev;
- if (phydev->link)
+ if (phydev->link) {
emac_mac_start(adpt);
- else
+ sgmii->link_up(adpt);
+ } else {
+ sgmii->link_down(adpt);
emac_mac_stop(adpt);
+ }
phy_print_status(phydev);
}
@@ -981,6 +975,7 @@ int emac_mac_up(struct emac_adapter *adpt)
emac_mac_config(adpt);
emac_mac_rx_descs_refill(adpt, &adpt->rx_q);
+ adpt->phydev->irq = PHY_IGNORE_INTERRUPT;
ret = phy_connect_direct(netdev, adpt->phydev, emac_adjust_link,
PHY_INTERFACE_MODE_SGMII);
if (ret) {
@@ -988,11 +983,12 @@ int emac_mac_up(struct emac_adapter *adpt)
return ret;
}
+ phy_attached_print(adpt->phydev, NULL);
+
/* enable mac irq */
writel((u32)~DIS_INT, adpt->base + EMAC_INT_STATUS);
writel(adpt->irq.mask, adpt->base + EMAC_INT_MASK);
- adpt->phydev->irq = PHY_IGNORE_INTERRUPT;
phy_start(adpt->phydev);
napi_enable(&adpt->rx_q.napi);
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.h b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
index f3aa24dc4a29..5028fb4bec2b 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.h
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.h
@@ -230,7 +230,6 @@ struct emac_adapter;
int emac_mac_up(struct emac_adapter *adpt);
void emac_mac_down(struct emac_adapter *adpt);
void emac_mac_reset(struct emac_adapter *adpt);
-void emac_mac_start(struct emac_adapter *adpt);
void emac_mac_stop(struct emac_adapter *adpt);
void emac_mac_mode_config(struct emac_adapter *adpt);
void emac_mac_rx_process(struct emac_adapter *adpt, struct emac_rx_queue *rx_q,
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-phy.c b/drivers/net/ethernet/qualcomm/emac/emac-phy.c
index 1d7852f4ccaa..441c19366489 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-phy.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-phy.c
@@ -226,8 +226,5 @@ int emac_phy_config(struct platform_device *pdev, struct emac_adapter *adpt)
return -ENODEV;
}
- if (adpt->phydev->drv)
- phy_attached_print(adpt->phydev, NULL);
-
return 0;
}
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
index 0149b523eda4..040b28977ee7 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.c
@@ -25,7 +25,9 @@
#define EMAC_SGMII_PHY_SPEED_CFG1 0x0074
#define EMAC_SGMII_PHY_IRQ_CMD 0x00ac
#define EMAC_SGMII_PHY_INTERRUPT_CLEAR 0x00b0
+#define EMAC_SGMII_PHY_INTERRUPT_MASK 0x00b4
#define EMAC_SGMII_PHY_INTERRUPT_STATUS 0x00b8
+#define EMAC_SGMII_PHY_RX_CHK_STATUS 0x00d4
#define FORCE_AN_TX_CFG BIT(5)
#define FORCE_AN_RX_CFG BIT(4)
@@ -36,6 +38,8 @@
#define SPDMODE_100 BIT(0)
#define SPDMODE_10 0
+#define CDR_ALIGN_DET BIT(6)
+
#define IRQ_GLOBAL_CLEAR BIT(0)
#define DECODE_CODE_ERR BIT(7)
@@ -44,47 +48,23 @@
#define SGMII_PHY_IRQ_CLR_WAIT_TIME 10
#define SGMII_PHY_INTERRUPT_ERR (DECODE_CODE_ERR | DECODE_DISP_ERR)
+#define SGMII_ISR_MASK (SGMII_PHY_INTERRUPT_ERR)
#define SERDES_START_WAIT_TIMES 100
-static int emac_sgmii_link_init(struct emac_adapter *adpt)
+/* Initialize the SGMII link between the internal and external PHYs. */
+static void emac_sgmii_link_init(struct emac_adapter *adpt)
{
- struct phy_device *phydev = adpt->phydev;
struct emac_sgmii *phy = &adpt->phy;
u32 val;
+ /* Always use autonegotiation. It works no matter how the external
+ * PHY is configured.
+ */
val = readl(phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
-
- if (phydev->autoneg == AUTONEG_ENABLE) {
- val &= ~(FORCE_AN_RX_CFG | FORCE_AN_TX_CFG);
- val |= AN_ENABLE;
- writel(val, phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
- } else {
- u32 speed_cfg;
-
- switch (phydev->speed) {
- case SPEED_10:
- speed_cfg = SPDMODE_10;
- break;
- case SPEED_100:
- speed_cfg = SPDMODE_100;
- break;
- case SPEED_1000:
- speed_cfg = SPDMODE_1000;
- break;
- default:
- return -EINVAL;
- }
-
- if (phydev->duplex == DUPLEX_FULL)
- speed_cfg |= DUPLEX_MODE;
-
- val &= ~AN_ENABLE;
- writel(speed_cfg, phy->base + EMAC_SGMII_PHY_SPEED_CFG1);
- writel(val, phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
- }
-
- return 0;
+ val &= ~(FORCE_AN_RX_CFG | FORCE_AN_TX_CFG);
+ val |= AN_ENABLE;
+ writel(val, phy->base + EMAC_SGMII_PHY_AUTONEG_CFG2);
}
static int emac_sgmii_irq_clear(struct emac_adapter *adpt, u32 irq_bits)
@@ -121,6 +101,51 @@ static int emac_sgmii_irq_clear(struct emac_adapter *adpt, u32 irq_bits)
return 0;
}
+/* The number of decode errors that triggers a reset */
+#define DECODE_ERROR_LIMIT 2
+
+static irqreturn_t emac_sgmii_interrupt(int irq, void *data)
+{
+ struct emac_adapter *adpt = data;
+ struct emac_sgmii *phy = &adpt->phy;
+ u32 status;
+
+ status = readl(phy->base + EMAC_SGMII_PHY_INTERRUPT_STATUS);
+ status &= SGMII_ISR_MASK;
+ if (!status)
+ return IRQ_HANDLED;
+
+ /* If we get a decoding error and CDR is not locked, then try
+ * resetting the internal PHY. The internal PHY uses an embedded
+ * clock with Clock and Data Recovery (CDR) to recover the
+ * clock and data.
+ */
+ if (status & SGMII_PHY_INTERRUPT_ERR) {
+ int count;
+
+ /* The SGMII is capable of recovering from some decode
+ * errors automatically. However, if we get multiple
+ * decode errors in a row, then assume that something
+ * is wrong and reset the interface.
+ */
+ count = atomic_inc_return(&phy->decode_error_count);
+ if (count == DECODE_ERROR_LIMIT) {
+ schedule_work(&adpt->work_thread);
+ atomic_set(&phy->decode_error_count, 0);
+ }
+ } else {
+ /* We only care about consecutive decode errors. */
+ atomic_set(&phy->decode_error_count, 0);
+ }
+
+ if (emac_sgmii_irq_clear(adpt, status)) {
+ netdev_warn(adpt->netdev, "failed to clear SGMII interrupt\n");
+ schedule_work(&adpt->work_thread);
+ }
+
+ return IRQ_HANDLED;
+}
+
static void emac_sgmii_reset_prepare(struct emac_adapter *adpt)
{
struct emac_sgmii *phy = &adpt->phy;
@@ -145,12 +170,7 @@ void emac_sgmii_reset(struct emac_adapter *adpt)
int ret;
emac_sgmii_reset_prepare(adpt);
-
- ret = emac_sgmii_link_init(adpt);
- if (ret) {
- netdev_err(adpt->netdev, "unsupported link speed\n");
- return;
- }
+ emac_sgmii_link_init(adpt);
ret = adpt->phy.initialize(adpt);
if (ret)
@@ -159,6 +179,68 @@ void emac_sgmii_reset(struct emac_adapter *adpt)
ret);
}
+static int emac_sgmii_open(struct emac_adapter *adpt)
+{
+ struct emac_sgmii *sgmii = &adpt->phy;
+ int ret;
+
+ if (sgmii->irq) {
+ /* Make sure interrupts are cleared and disabled first */
+ ret = emac_sgmii_irq_clear(adpt, 0xff);
+ if (ret)
+ return ret;
+ writel(0, sgmii->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+
+ ret = request_irq(sgmii->irq, emac_sgmii_interrupt, 0,
+ "emac-sgmii", adpt);
+ if (ret) {
+ netdev_err(adpt->netdev,
+ "could not register handler for internal PHY\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int emac_sgmii_close(struct emac_adapter *adpt)
+{
+ struct emac_sgmii *sgmii = &adpt->phy;
+
+ /* Make sure interrupts are disabled */
+ writel(0, sgmii->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+ free_irq(sgmii->irq, adpt);
+
+ return 0;
+}
+
+/* The error interrupts are only valid after the link is up */
+static int emac_sgmii_link_up(struct emac_adapter *adpt)
+{
+ struct emac_sgmii *sgmii = &adpt->phy;
+ int ret;
+
+ /* Clear and enable interrupts */
+ ret = emac_sgmii_irq_clear(adpt, 0xff);
+ if (ret)
+ return ret;
+
+ writel(SGMII_ISR_MASK, sgmii->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+
+ return 0;
+}
+
+static int emac_sgmii_link_down(struct emac_adapter *adpt)
+{
+ struct emac_sgmii *sgmii = &adpt->phy;
+
+ /* Disable interrupts */
+ writel(0, sgmii->base + EMAC_SGMII_PHY_INTERRUPT_MASK);
+ synchronize_irq(sgmii->irq);
+
+ return 0;
+}
+
static int emac_sgmii_acpi_match(struct device *dev, void *data)
{
#ifdef CONFIG_ACPI
@@ -169,7 +251,7 @@ static int emac_sgmii_acpi_match(struct device *dev, void *data)
{}
};
const struct acpi_device_id *id = acpi_match_device(match_table, dev);
- emac_sgmii_initialize *initialize = data;
+ emac_sgmii_function *initialize = data;
if (id) {
acpi_handle handle = ACPI_HANDLE(dev);
@@ -256,9 +338,14 @@ int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
goto error_put_device;
}
- phy->initialize = (emac_sgmii_initialize)match->data;
+ phy->initialize = (emac_sgmii_function)match->data;
}
+ phy->open = emac_sgmii_open;
+ phy->close = emac_sgmii_close;
+ phy->link_up = emac_sgmii_link_up;
+ phy->link_down = emac_sgmii_link_down;
+
/* Base address is the first address */
res = platform_get_resource(sgmii_pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -286,7 +373,11 @@ int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
if (ret)
goto error;
- emac_sgmii_irq_clear(adpt, SGMII_PHY_INTERRUPT_ERR);
+ emac_sgmii_link_init(adpt);
+
+ ret = platform_get_irq(sgmii_pdev, 0);
+ if (ret > 0)
+ phy->irq = ret;
/* We've remapped the addresses, so we don't need the device any
* more. of_find_device_by_node() says we should release it.
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
index 4a8f6b174f4b..e7c0c3b2baa4 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii.h
@@ -16,17 +16,29 @@
struct emac_adapter;
struct platform_device;
-typedef int (*emac_sgmii_initialize)(struct emac_adapter *adpt);
+typedef int (*emac_sgmii_function)(struct emac_adapter *adpt);
/** emac_sgmii - internal emac phy
* @base base address
* @digital per-lane digital block
+ * @irq the interrupt number
+ * @decode_error_count reference count of consecutive decode errors
* @initialize initialization function
+ * @open called when the driver is opened
+ * @close called when the driver is closed
+ * @link_up called when the link comes up
+ * @link_down called when the link comes down
*/
struct emac_sgmii {
void __iomem *base;
void __iomem *digital;
- emac_sgmii_initialize initialize;
+ unsigned int irq;
+ atomic_t decode_error_count;
+ emac_sgmii_function initialize;
+ emac_sgmii_function open;
+ emac_sgmii_function close;
+ emac_sgmii_function link_up;
+ emac_sgmii_function link_down;
};
int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt);
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c
index 3e1be9107d55..f519351ef3a2 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac.c
@@ -280,7 +280,13 @@ static int emac_open(struct net_device *netdev)
return ret;
}
- emac_mac_start(adpt);
+ ret = adpt->phy.open(adpt);
+ if (ret) {
+ emac_mac_down(adpt);
+ emac_mac_rx_tx_rings_free_all(adpt);
+ free_irq(irq->irq, irq);
+ return ret;
+ }
return 0;
}
@@ -292,6 +298,7 @@ static int emac_close(struct net_device *netdev)
mutex_lock(&adpt->reset_lock);
+ adpt->phy.close(adpt);
emac_mac_down(adpt);
emac_mac_rx_tx_rings_free_all(adpt);
@@ -647,6 +654,7 @@ static int emac_probe(struct platform_device *pdev)
adpt->msg_enable = EMAC_MSG_DEFAULT;
phy = &adpt->phy;
+ atomic_set(&phy->decode_error_count, 0);
mutex_init(&adpt->reset_lock);
spin_lock_init(&adpt->stats.lock);
diff --git a/drivers/net/ethernet/qualcomm/emac/emac.h b/drivers/net/ethernet/qualcomm/emac/emac.h
index 2725507ae866..ef91dcc7f646 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac.h
+++ b/drivers/net/ethernet/qualcomm/emac/emac.h
@@ -167,10 +167,6 @@ enum emac_clk_id {
#define EMAC_MAX_SETUP_LNK_CYCLE 100
-/* Wake On Lan */
-#define EMAC_WOL_PHY 0x00000001 /* PHY Status Change */
-#define EMAC_WOL_MAGIC 0x00000002 /* Magic Packet */
-
struct emac_stats {
/* rx */
u64 rx_ok; /* good packets */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-18 12:21:09 +0300