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[net-next,v6,05/14] net: ethernet: oa_tc6: implement error interrupts unmasking

Message ID 20240812102611.489550-6-Parthiban.Veerasooran@microchip.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series Add support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 49 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-13--12-00 (tests: 706)

Commit Message

Parthiban Veerasooran Aug. 12, 2024, 10:26 a.m. UTC
This will unmask the following error interrupts from the MAC-PHY.
  tx protocol error
  rx buffer overflow error
  loss of framing error
  header error
The MAC-PHY will signal an error by setting the EXST bit in the receive
data footer which will then allow the host to read the STATUS0 register
to find the source of the error.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
---
 drivers/net/ethernet/oa_tc6.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index f774ed397213..86b032cdbee1 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -18,6 +18,13 @@ 
 #define OA_TC6_REG_STATUS0			0x0008
 #define STATUS0_RESETC				BIT(6)	/* Reset Complete */
 
+/* Interrupt Mask Register #0 */
+#define OA_TC6_REG_INT_MASK0			0x000C
+#define INT_MASK0_HEADER_ERR_MASK		BIT(5)
+#define INT_MASK0_LOSS_OF_FRAME_ERR_MASK	BIT(4)
+#define INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK	BIT(3)
+#define INT_MASK0_TX_PROTOCOL_ERR_MASK		BIT(0)
+
 /* Control command header */
 #define OA_TC6_CTRL_HEADER_DATA_NOT_CTRL	BIT(31)
 #define OA_TC6_CTRL_HEADER_WRITE_NOT_READ	BIT(29)
@@ -327,6 +334,23 @@  static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)
 	return oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);
 }
 
+static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)
+{
+	u32 regval;
+	int ret;
+
+	ret = oa_tc6_read_register(tc6, OA_TC6_REG_INT_MASK0, &regval);
+	if (ret)
+		return ret;
+
+	regval &= ~(INT_MASK0_TX_PROTOCOL_ERR_MASK |
+		    INT_MASK0_RX_BUFFER_OVERFLOW_ERR_MASK |
+		    INT_MASK0_LOSS_OF_FRAME_ERR_MASK |
+		    INT_MASK0_HEADER_ERR_MASK);
+
+	return oa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);
+}
+
 /**
  * oa_tc6_init - allocates and initializes oa_tc6 structure.
  * @spi: device with which data will be exchanged.
@@ -369,6 +393,13 @@  struct oa_tc6 *oa_tc6_init(struct spi_device *spi)
 		return NULL;
 	}
 
+	ret = oa_tc6_unmask_macphy_error_interrupts(tc6);
+	if (ret) {
+		dev_err(&tc6->spi->dev,
+			"MAC-PHY error interrupts unmask failed: %d\n", ret);
+		return NULL;
+	}
+
 	return tc6;
 }
 EXPORT_SYMBOL_GPL(oa_tc6_init);