[Intel-wired-lan] [PATCH v2 intel-next 2/3] ice: add i2c write command
Karol Kolacinski
karol.kolacinski at intel.com
Fri Apr 22 11:42:56 UTC 2022
Add the possibility to write to connected i2c devices using the AQ
command. FW may reject the write if the device is not on allowlist.
Signed-off-by: Karol Kolacinski <karol.kolacinski at intel.com>
---
.../net/ethernet/intel/ice/ice_adminq_cmd.h | 7 +--
drivers/net/ethernet/intel/ice/ice_common.c | 51 ++++++++++++++++++-
drivers/net/ethernet/intel/ice/ice_common.h | 4 ++
3 files changed, 58 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
index b25e27c4d887..bedc19f12cbd 100644
--- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
@@ -1401,7 +1401,7 @@ struct ice_aqc_get_link_topo {
u8 rsvd[9];
};
-/* Read I2C (direct, 0x06E2) */
+/* Read/Write I2C (direct, 0x06E2/0x06E3) */
struct ice_aqc_i2c {
struct ice_aqc_link_topo_addr topo_addr;
__le16 i2c_addr;
@@ -1411,7 +1411,7 @@ struct ice_aqc_i2c {
u8 rsvd;
__le16 i2c_bus_addr;
- u8 rsvd2[4];
+ u8 i2c_data[4]; /* Used only by write command, reserved in read. */
};
/* Read I2C Response (direct, 0x06E2) */
@@ -2130,7 +2130,7 @@ struct ice_aq_desc {
struct ice_aqc_get_link_status get_link_status;
struct ice_aqc_event_lan_overflow lan_overflow;
struct ice_aqc_get_link_topo get_link_topo;
- struct ice_aqc_i2c read_i2c;
+ struct ice_aqc_i2c read_write_i2c;
struct ice_aqc_read_i2c_resp read_i2c_resp;
} params;
};
@@ -2247,6 +2247,7 @@ enum ice_adminq_opc {
ice_aqc_opc_set_mac_lb = 0x0620,
ice_aqc_opc_get_link_topo = 0x06E0,
ice_aqc_opc_read_i2c = 0x06E2,
+ ice_aqc_opc_write_i2c = 0x06E3,
ice_aqc_opc_set_port_id_led = 0x06E9,
ice_aqc_opc_set_gpio = 0x06EC,
ice_aqc_opc_get_gpio = 0x06ED,
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 9619bdb9e49a..1999c19a786e 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -4823,7 +4823,7 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
int status;
ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_read_i2c);
- cmd = &desc.params.read_i2c;
+ cmd = &desc.params.read_write_i2c;
if (!data)
return -EINVAL;
@@ -4850,6 +4850,55 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
return status;
}
+/**
+ * ice_aq_write_i2c
+ * @hw: pointer to the hw struct
+ * @topo_addr: topology address for a device to communicate with
+ * @bus_addr: 7-bit I2C bus address
+ * @addr: I2C memory address (I2C offset) with up to 16 bits
+ * @params: I2C parameters: bit [4] - I2C address type, bits [3:0] - data size to write (0-7 bytes)
+ * @data: pointer to data (0 to 4 bytes) to be written to the I2C device
+ * @cd: pointer to command details structure or NULL
+ *
+ * Write I2C (0x06E3)
+ *
+ * * Return:
+ * * 0 - Successful write to the i2c device
+ * * -EINVAL - Data size greater than 4 bytes
+ * * -EIO - FW error
+ */
+int
+ice_aq_write_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
+ u16 bus_addr, __le16 addr, u8 params, u8 *data,
+ struct ice_sq_cd *cd)
+{
+ struct ice_aq_desc desc = { 0 };
+ struct ice_aqc_i2c *cmd;
+ unsigned int i;
+ u8 data_size;
+
+ ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_write_i2c);
+ cmd = &desc.params.read_write_i2c;
+
+ data_size = FIELD_GET(ICE_AQC_I2C_DATA_SIZE_M, params);
+
+ /* data_size limited to 4 */
+ if (data_size > 4)
+ return -EINVAL;
+
+ cmd->i2c_bus_addr = cpu_to_le16(bus_addr);
+ cmd->topo_addr = topo_addr;
+ cmd->i2c_params = params;
+ cmd->i2c_addr = addr;
+
+ for (i = 0; i < data_size; i++) {
+ cmd->i2c_data[i] = *data;
+ data++;
+ }
+
+ return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
+}
+
/**
* ice_aq_set_driver_param - Set driver parameter to share via firmware
* @hw: pointer to the HW struct
diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h
index 872ea7d2332d..61b7c60db689 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.h
+++ b/drivers/net/ethernet/intel/ice/ice_common.h
@@ -214,5 +214,9 @@ int
ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
u16 bus_addr, __le16 addr, u8 params, u8 *data,
struct ice_sq_cd *cd);
+int
+ice_aq_write_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
+ u16 bus_addr, __le16 addr, u8 params, u8 *data,
+ struct ice_sq_cd *cd);
bool ice_fw_supports_report_dflt_cfg(struct ice_hw *hw);
#endif /* _ICE_COMMON_H_ */
--
2.34.1
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