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 v4 03/12] net: ethernet: oa_tc6: implement register read operation
Date: Thu, 18 Apr 2024 18:26:39 +0530 [thread overview]
Message-ID: <20240418125648.372526-4-Parthiban.Veerasooran@microchip.com> (raw)
In-Reply-To: <20240418125648.372526-1-Parthiban.Veerasooran@microchip.com>
Implement register read operation according to the control communication
specified in the OPEN Alliance 10BASE-T1x MACPHY Serial Interface
document. Control read commands are used by the SPI host to read
registers within the MAC-PHY. Each control read commands are composed of
a 32 bits control command header.
The MAC-PHY ignores all data from the SPI host following the control
header for the remainder of the control read command. Control read
commands can read either a single register or multiple consecutive
registers. When multiple consecutive registers are read, the address is
automatically post-incremented by the MAC-PHY. Reading any unimplemented
or undefined registers shall return zero.
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
---
drivers/net/ethernet/oa_tc6.c | 84 ++++++++++++++++++++++++++++++++++-
include/linux/oa_tc6.h | 3 ++
2 files changed, 85 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index a92337de4534..f563329912e2 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -38,6 +38,7 @@ enum oa_tc6_header_type {
};
enum oa_tc6_register_op {
+ OA_TC6_CTRL_REG_READ = 0,
OA_TC6_CTRL_REG_WRITE = 1,
};
@@ -113,7 +114,8 @@ static void oa_tc6_prepare_ctrl_spi_buf(struct oa_tc6 *tc6, u32 address,
*tx_buf = oa_tc6_prepare_ctrl_header(address, length, reg_op);
- oa_tc6_update_ctrl_write_data(tc6, value, length);
+ if (reg_op == OA_TC6_CTRL_REG_WRITE)
+ oa_tc6_update_ctrl_write_data(tc6, value, length);
}
static int oa_tc6_check_ctrl_write_reply(struct oa_tc6 *tc6, u8 size)
@@ -132,6 +134,30 @@ static int oa_tc6_check_ctrl_write_reply(struct oa_tc6 *tc6, u8 size)
return 0;
}
+static int oa_tc6_check_ctrl_read_reply(struct oa_tc6 *tc6, u8 size)
+{
+ u32 *tx_buf = tc6->spi_ctrl_tx_buf;
+ u32 *rx_buf = tc6->spi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE;
+
+ /* The echoed control read header must match with the one that was
+ * transmitted.
+ */
+ if (*tx_buf != *rx_buf)
+ return -EPROTO;
+
+ return 0;
+}
+
+static void oa_tc6_copy_ctrl_read_data(struct oa_tc6 *tc6, u32 value[],
+ u8 length)
+{
+ __be32 *rx_buf = tc6->spi_ctrl_rx_buf + OA_TC6_CTRL_IGNORED_SIZE +
+ OA_TC6_CTRL_HEADER_SIZE;
+
+ for (int i = 0; i < length; i++)
+ value[i] = be32_to_cpu(*rx_buf++);
+}
+
static int oa_tc6_perform_ctrl(struct oa_tc6 *tc6, u32 address, u32 value[],
u8 length, enum oa_tc6_register_op reg_op)
{
@@ -152,8 +178,62 @@ static int oa_tc6_perform_ctrl(struct oa_tc6 *tc6, u32 address, u32 value[],
}
/* Check echoed/received control write command reply for errors */
- return oa_tc6_check_ctrl_write_reply(tc6, size);
+ if (reg_op == OA_TC6_CTRL_REG_WRITE)
+ return oa_tc6_check_ctrl_write_reply(tc6, size);
+
+ /* Check echoed/received control read command reply for errors */
+ ret = oa_tc6_check_ctrl_read_reply(tc6, size);
+ if (ret)
+ return ret;
+
+ oa_tc6_copy_ctrl_read_data(tc6, value, length);
+
+ return 0;
+}
+
+/**
+ * oa_tc6_read_registers - function for reading multiple consecutive registers.
+ * @tc6: oa_tc6 struct.
+ * @address: address of the first register to be read in the MAC-PHY.
+ * @value: values to be read from the starting register address @address.
+ * @length: number of consecutive registers to be read from @address.
+ *
+ * Maximum of 128 consecutive registers can be read starting at @address.
+ *
+ * Returns 0 on success otherwise failed.
+ */
+int oa_tc6_read_registers(struct oa_tc6 *tc6, u32 address, u32 value[],
+ u8 length)
+{
+ int ret;
+
+ if (!length || length > OA_TC6_CTRL_MAX_REGISTERS) {
+ dev_err(&tc6->spi->dev, "Invalid register length parameter\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&tc6->spi_ctrl_lock);
+ ret = oa_tc6_perform_ctrl(tc6, address, value, length,
+ OA_TC6_CTRL_REG_READ);
+ mutex_unlock(&tc6->spi_ctrl_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(oa_tc6_read_registers);
+
+/**
+ * oa_tc6_read_register - function for reading a MAC-PHY register.
+ * @tc6: oa_tc6 struct.
+ * @address: register address of the MAC-PHY to be read.
+ * @value: value read from the @address register address of the MAC-PHY.
+ *
+ * Returns 0 on success otherwise failed.
+ */
+int oa_tc6_read_register(struct oa_tc6 *tc6, u32 address, u32 *value)
+{
+ return oa_tc6_read_registers(tc6, address, value, 1);
}
+EXPORT_SYMBOL_GPL(oa_tc6_read_register);
/**
* oa_tc6_write_registers - function for writing multiple consecutive registers.
diff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h
index 99c490f1c8a8..85aeecf87306 100644
--- a/include/linux/oa_tc6.h
+++ b/include/linux/oa_tc6.h
@@ -15,3 +15,6 @@ struct oa_tc6 *oa_tc6_init(struct spi_device *spi);
int oa_tc6_write_register(struct oa_tc6 *tc6, u32 address, u32 value);
int oa_tc6_write_registers(struct oa_tc6 *tc6, u32 address, u32 value[],
u8 length);
+int oa_tc6_read_register(struct oa_tc6 *tc6, u32 address, u32 *value);
+int oa_tc6_read_registers(struct oa_tc6 *tc6, u32 address, u32 value[],
+ u8 length);
--
2.34.1
next prev parent reply other threads:[~2024-04-18 12:57 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-18 12:56 [PATCH net-next v4 00/12] Add support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface Parthiban Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 01/12] Documentation: networking: add OPEN Alliance 10BASE-T1x MAC-PHY serial interface Parthiban Veerasooran
2024-04-28 9:33 ` Bagas Sanjaya
2024-04-29 11:31 ` Parthiban.Veerasooran
2024-04-29 16:17 ` Simon Horman
2024-04-30 11:30 ` Parthiban.Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 02/12] net: ethernet: oa_tc6: implement register write operation Parthiban Veerasooran
2024-04-22 23:48 ` Andrew Lunn
2024-04-23 4:38 ` Parthiban.Veerasooran
2024-04-23 23:14 ` Andrew Lunn
2024-04-26 5:55 ` Parthiban.Veerasooran
2024-04-29 16:36 ` Simon Horman
2024-04-30 8:14 ` Parthiban.Veerasooran
2024-04-18 12:56 ` Parthiban Veerasooran [this message]
2024-04-23 23:17 ` [PATCH net-next v4 03/12] net: ethernet: oa_tc6: implement register read operation Andrew Lunn
2024-04-26 5:56 ` Parthiban.Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 04/12] net: ethernet: oa_tc6: implement software reset Parthiban Veerasooran
2024-04-23 23:26 ` Andrew Lunn
2024-04-26 6:38 ` Parthiban.Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 05/12] net: ethernet: oa_tc6: implement error interrupts unmasking Parthiban Veerasooran
2024-04-23 23:27 ` Andrew Lunn
2024-04-27 19:52 ` Ramón Nordin Rodriguez
2024-04-27 21:17 ` Andrew Lunn
2024-04-27 21:55 ` Ramón Nordin Rodriguez
2024-04-28 14:48 ` Andrew Lunn
2024-04-28 9:54 ` Ramón Nordin Rodriguez
2024-04-28 14:59 ` Andrew Lunn
2024-04-28 22:04 ` Ramón Nordin Rodriguez
2024-05-01 18:29 ` Ramón Nordin Rodriguez
2024-05-01 19:58 ` Andrew Lunn
2024-05-01 20:07 ` Andrew Lunn
2024-05-02 10:10 ` Parthiban.Veerasooran
2024-05-02 10:19 ` Ramón Nordin Rodriguez
2024-05-03 7:10 ` Parthiban.Veerasooran
2024-05-06 1:21 ` Andrew Lunn
2024-05-06 6:47 ` Piergiorgio Beruto
2024-05-07 12:44 ` Ramón Nordin Rodriguez
2024-05-13 6:41 ` Ramón Nordin Rodriguez
2024-05-13 13:00 ` Andrew Lunn
2024-05-13 13:50 ` Ramón Nordin Rodriguez
2024-05-13 14:04 ` Andrew Lunn
2024-05-15 21:45 ` Ramón Nordin Rodriguez
2024-05-14 4:46 ` Parthiban.Veerasooran
2024-05-15 21:48 ` Ramón Nordin Rodriguez
2024-04-18 12:56 ` [PATCH net-next v4 06/12] net: ethernet: oa_tc6: implement internal PHY initialization Parthiban Veerasooran
2024-04-23 23:48 ` Andrew Lunn
2024-04-26 13:17 ` Parthiban.Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 07/12] net: ethernet: oa_tc6: enable open alliance tc6 data communication Parthiban Veerasooran
2024-04-23 23:49 ` Andrew Lunn
2024-04-18 12:56 ` [PATCH net-next v4 08/12] net: ethernet: oa_tc6: implement transmit path to transfer tx ethernet frames Parthiban Veerasooran
2024-04-24 0:02 ` Andrew Lunn
2024-04-26 13:19 ` Parthiban.Veerasooran
2024-04-18 12:56 ` [PATCH net-next v4 09/12] net: ethernet: oa_tc6: implement receive path to receive rx " Parthiban Veerasooran
2024-04-24 0:08 ` Andrew Lunn
2024-04-26 13:45 ` Parthiban.Veerasooran
2024-04-26 18:13 ` Andrew Lunn
2024-04-29 6:13 ` Parthiban.Veerasooran
2024-04-27 20:02 ` Ramón Nordin Rodriguez
2024-04-29 8:32 ` Parthiban.Veerasooran
2024-04-29 10:45 ` Ramón Nordin Rodriguez
2024-04-18 12:56 ` [PATCH net-next v4 10/12] net: ethernet: oa_tc6: implement mac-phy interrupt Parthiban Veerasooran
2024-04-24 0:10 ` Andrew Lunn
2024-04-18 12:56 ` [PATCH net-next v4 11/12] microchip: lan865x: add driver support for Microchip's LAN865X MAC-PHY Parthiban Veerasooran
2024-04-24 0:27 ` Andrew Lunn
2024-04-26 13:32 ` Parthiban.Veerasooran
2024-04-26 18:14 ` Andrew Lunn
2024-04-29 6:13 ` Parthiban.Veerasooran
2024-04-27 19:19 ` Ramón Nordin Rodriguez
2024-04-27 19:57 ` Conor Dooley
2024-04-27 20:13 ` Ramón Nordin Rodriguez
2024-04-27 20:22 ` Conor Dooley
2024-04-27 21:09 ` Ramón Nordin Rodriguez
2024-04-29 9:47 ` Parthiban.Veerasooran
2024-04-29 12:09 ` Andrew Lunn
2024-04-30 13:30 ` Parthiban.Veerasooran
2024-04-30 16:55 ` Conor Dooley
2024-05-02 5:56 ` Parthiban.Veerasooran
2024-04-27 20:40 ` Andrew Lunn
2024-04-27 21:06 ` Ramón Nordin Rodriguez
2024-04-28 14:18 ` Andrew Lunn
2024-04-27 19:35 ` Ramón Nordin Rodriguez
2024-04-27 20:58 ` Andrew Lunn
2024-04-27 21:29 ` Ramón Nordin Rodriguez
2024-04-28 14:25 ` Andrew Lunn
2024-04-28 22:00 ` Ramón Nordin Rodriguez
2024-04-18 12:56 ` [PATCH net-next v4 12/12] dt-bindings: net: add Microchip's LAN865X 10BASE-T1S MACPHY Parthiban Veerasooran
2024-04-18 15:39 ` Conor Dooley
2024-04-22 3:59 ` Parthiban.Veerasooran
2024-04-22 15:50 ` Conor Dooley
2024-04-23 3:27 ` Parthiban.Veerasooran
2024-04-22 20:07 ` [PATCH net-next v4 00/12] Add support for OPEN Alliance 10BASE-T1x MACPHY Serial Interface Andrew Lunn
2024-04-22 20:08 ` Andrew Lunn
2024-04-22 23:23 ` Andrew Lunn
2024-05-08 13:05 ` Parthiban.Veerasooran
2024-05-08 17:04 ` Andrew Lunn
2024-05-09 13:04 ` Parthiban.Veerasooran
2024-05-09 20:39 ` Andrew Lunn
2024-05-10 11:22 ` Parthiban.Veerasooran
2024-04-22 23:43 ` Andrew Lunn
2024-04-28 21:16 ` [PATCH net-next v4 13/12] net: lan865x: optional hardware reset Ramón Nordin Rodriguez
2024-04-28 23:17 ` Andrew Lunn
2024-04-29 10:42 ` Ramón Nordin Rodriguez
2024-04-29 6:09 ` Parthiban.Veerasooran
2024-04-29 10:38 ` Ramón Nordin Rodriguez
2024-04-29 12:19 ` Andrew Lunn
2024-04-30 8:04 ` Ramón Nordin Rodriguez
2024-04-30 13:30 ` Parthiban.Veerasooran
2024-04-30 14:14 ` Andrew Lunn
2024-05-02 10:10 ` Parthiban.Veerasooran
2024-04-29 6:09 ` Krzysztof Kozlowski
2024-04-29 10:44 ` Ramón Nordin Rodriguez
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