From: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
To: <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
<pabeni@redhat.com>, <horms@kernel.org>, <saeedm@nvidia.com>,
<anthony.l.nguyen@intel.com>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <andrew@lunn.ch>,
<corbet@lwn.net>, <linux-doc@vger.kernel.org>,
<robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
<conor+dt@kernel.org>, <devicetree@vger.kernel.org>,
<horatiu.vultur@microchip.com>, <ruanjinjie@huawei.com>,
<steen.hegelund@microchip.com>, <vladimir.oltean@nxp.com>
Cc: <UNGLinuxDriver@microchip.com>,
<Thorsten.Kummermehr@microchip.com>, <Pier.Beruto@onsemi.com>,
<Selvamani.Rajagopal@onsemi.com>, <Nicolas.Ferre@microchip.com>,
<benjamin.bigler@bernformulastudent.ch>,
Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Subject: [PATCH net-next v3 04/12] net: ethernet: oa_tc6: implement software reset
Date: Wed, 6 Mar 2024 14:20:09 +0530 [thread overview]
Message-ID: <20240306085017.21731-5-Parthiban.Veerasooran@microchip.com> (raw)
In-Reply-To: <20240306085017.21731-1-Parthiban.Veerasooran@microchip.com>
Reset complete bit is set when the MAC-PHY reset completes and ready for
configuration. Additionally reset complete bit in the STS0 register has
to be written by one upon reset complete to clear the interrupt.
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
---
drivers/net/ethernet/oa_tc6.c | 53 +++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index 35e377577ba4..e9ddc4ff7d0d 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -6,8 +6,18 @@
*/
#include <linux/bitfield.h>
+#include <linux/iopoll.h>
#include <linux/oa_tc6.h>
+/* OPEN Alliance TC6 registers */
+/* Reset Control and Status Register */
+#define OA_TC6_REG_RESET 0x0003
+#define RESET_SWRESET BIT(0) /* Software Reset */
+
+/* Status Register #0 */
+#define OA_TC6_REG_STATUS0 0x0008
+#define STATUS0_RESETC BIT(6) /* Reset Complete */
+
/* Control command header */
#define OA_TC6_CTRL_HEADER_DATA_NOT_CTRL BIT(31)
#define OA_TC6_CTRL_HEADER_WRITE BIT(29)
@@ -24,6 +34,8 @@
(OA_TC6_CTRL_MAX_REGISTERS *\
OA_TC6_CTRL_REG_VALUE_SIZE) +\
OA_TC6_CTRL_IGNORED_SIZE)
+#define STATUS0_RESETC_POLL_DELAY 5
+#define STATUS0_RESETC_POLL_TIMEOUT 100
/* Internal structure for MAC-PHY drivers */
struct oa_tc6 {
@@ -279,6 +291,39 @@ int oa_tc6_write_register(struct oa_tc6 *tc6, u32 address, u32 value)
}
EXPORT_SYMBOL_GPL(oa_tc6_write_register);
+static int oa_tc6_read_sw_reset_status(struct oa_tc6 *tc6)
+{
+ u32 regval;
+ int ret;
+
+ ret = oa_tc6_read_register(tc6, OA_TC6_REG_STATUS0, ®val);
+ if (ret)
+ return 0;
+
+ return regval;
+}
+
+static int oa_tc6_sw_reset_macphy(struct oa_tc6 *tc6)
+{
+ u32 regval = RESET_SWRESET;
+ int ret;
+
+ ret = oa_tc6_write_register(tc6, OA_TC6_REG_RESET, regval);
+ if (ret)
+ return ret;
+
+ /* Poll for soft reset complete for every 5us until 100us timeout */
+ ret = readx_poll_timeout(oa_tc6_read_sw_reset_status, tc6, regval,
+ regval & STATUS0_RESETC,
+ STATUS0_RESETC_POLL_DELAY,
+ STATUS0_RESETC_POLL_TIMEOUT);
+ if (ret)
+ return -ENODEV;
+
+ /* Clear the reset complete status */
+ return oa_tc6_write_register(tc6, OA_TC6_REG_STATUS0, regval);
+}
+
/**
* oa_tc6_init - allocates and initializes oa_tc6 structure.
* @spi: device with which data will be exchanged.
@@ -289,6 +334,7 @@ EXPORT_SYMBOL_GPL(oa_tc6_write_register);
struct oa_tc6 *oa_tc6_init(struct spi_device *spi)
{
struct oa_tc6 *tc6;
+ int ret;
tc6 = devm_kzalloc(&spi->dev, sizeof(*tc6), GFP_KERNEL);
if (!tc6)
@@ -311,6 +357,13 @@ struct oa_tc6 *oa_tc6_init(struct spi_device *spi)
if (!tc6->spi_ctrl_rx_buf)
return NULL;
+ ret = oa_tc6_sw_reset_macphy(tc6);
+ if (ret) {
+ dev_err(&tc6->spi->dev,
+ "MAC-PHY software reset failed: %d\n", ret);
+ return NULL;
+ }
+
return tc6;
}
EXPORT_SYMBOL_GPL(oa_tc6_init);
--
2.34.1
next prev parent reply other threads:[~2024-03-06 8:51 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-06 8:50 [PATCH net-next v3 00/12] Add support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface Parthiban Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 01/12] Documentation: networking: add OPEN Alliance 10BASE-T1x MAC-PHY serial interface Parthiban Veerasooran
2024-03-06 13:23 ` Andrew Lunn
2024-03-07 6:29 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 02/12] net: ethernet: oa_tc6: implement register write operation Parthiban Veerasooran
2024-03-06 13:40 ` Andrew Lunn
2024-03-07 6:46 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 03/12] net: ethernet: oa_tc6: implement register read operation Parthiban Veerasooran
2024-03-07 0:19 ` Andrew Lunn
2024-03-07 7:04 ` Parthiban.Veerasooran
2024-03-07 13:22 ` Andrew Lunn
2024-03-08 7:12 ` Parthiban.Veerasooran
2024-03-06 8:50 ` Parthiban Veerasooran [this message]
2024-03-07 0:35 ` [PATCH net-next v3 04/12] net: ethernet: oa_tc6: implement software reset Andrew Lunn
2024-03-07 7:39 ` Parthiban.Veerasooran
2024-03-07 13:24 ` Andrew Lunn
2024-03-08 8:25 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 05/12] net: ethernet: oa_tc6: implement error interrupts unmasking Parthiban Veerasooran
2024-03-07 0:43 ` Andrew Lunn
2024-03-07 8:28 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 06/12] net: ethernet: oa_tc6: implement internal PHY initialization Parthiban Veerasooran
2024-03-07 1:13 ` Andrew Lunn
2024-03-07 14:41 ` Parthiban.Veerasooran
2024-03-07 16:36 ` Andrew Lunn
2024-03-08 12:05 ` Parthiban.Veerasooran
2024-03-08 13:33 ` Andrew Lunn
2024-03-18 11:01 ` Parthiban.Veerasooran
2024-04-12 10:43 ` Parthiban.Veerasooran
2024-04-15 13:15 ` Andrew Lunn
2024-04-16 11:02 ` Parthiban.Veerasooran
2024-04-16 18:18 ` Andrew Lunn
2024-04-17 8:55 ` Parthiban.Veerasooran
2024-03-21 18:49 ` Selvamani Rajagopal
2024-03-22 5:50 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 07/12] net: ethernet: oa_tc6: enable open alliance tc6 data communication Parthiban Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 08/12] net: ethernet: oa_tc6: implement transmit path to transfer tx ethernet frames Parthiban Veerasooran
2024-03-07 17:08 ` Andrew Lunn
2024-03-19 12:54 ` Parthiban.Veerasooran
2024-03-19 13:19 ` Andrew Lunn
2024-03-20 10:43 ` Parthiban.Veerasooran
2024-03-21 19:04 ` Selvamani Rajagopal
2024-03-21 19:42 ` Andrew Lunn
2024-03-22 18:31 ` Selvamani Rajagopal
2024-03-06 8:50 ` [PATCH net-next v3 09/12] net: ethernet: oa_tc6: implement receive path to receive rx " Parthiban Veerasooran
2024-03-08 0:14 ` Andrew Lunn
2024-03-19 12:54 ` Parthiban.Veerasooran
2024-03-19 13:20 ` Andrew Lunn
2024-03-20 5:55 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 10/12] net: ethernet: oa_tc6: implement mac-phy interrupt Parthiban Veerasooran
2024-03-06 23:42 ` Woojung.Huh
2024-03-07 10:16 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 11/12] microchip: lan865x: add driver support for Microchip's LAN865X MAC-PHY Parthiban Veerasooran
2024-03-06 23:44 ` Woojung.Huh
2024-03-07 9:13 ` Parthiban.Veerasooran
2024-03-06 8:50 ` [PATCH net-next v3 12/12] dt-bindings: net: add Microchip's LAN865X 10BASE-T1S MACPHY Parthiban Veerasooran
2024-03-06 18:16 ` Conor Dooley
2024-03-06 18:48 ` Andrew Lunn
2024-03-06 19:01 ` Conor Dooley
2024-03-20 8:40 ` Parthiban.Veerasooran
2024-03-20 9:53 ` Krzysztof Kozlowski
2024-03-21 8:38 ` Parthiban.Veerasooran
2024-03-21 8:40 ` Krzysztof Kozlowski
2024-03-21 12:00 ` Parthiban.Veerasooran
2024-03-21 15:34 ` Conor Dooley
2024-03-22 6:25 ` Parthiban.Veerasooran
2024-03-22 7:03 ` Krzysztof Kozlowski
2024-03-22 8:28 ` Parthiban.Veerasooran
2024-03-23 10:24 ` Krzysztof Kozlowski
2024-03-25 7:10 ` Parthiban.Veerasooran
2024-03-25 7:10 ` Parthiban.Veerasooran
2024-03-22 18:08 ` Conor Dooley
2024-03-25 7:12 ` Parthiban.Veerasooran
2024-03-20 8:40 ` Parthiban.Veerasooran
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