[dpdk-dev] [PATCH 10/26] ixgbe/base: add logic to reset CS4227 when needed
Wenzhuo Lu
wenzhuo.lu at intel.com
Fri Jun 5 07:21:42 CEST 2015
On some hardware platforms, the CS4227 does not initialize properly.
Detect those cases and reset it appropriately.
Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
drivers/net/ixgbe/base/ixgbe_phy.h | 12 +++
drivers/net/ixgbe/base/ixgbe_x550.c | 184 ++++++++++++++++++++++++++++++++++++
2 files changed, 196 insertions(+)
diff --git a/drivers/net/ixgbe/base/ixgbe_phy.h b/drivers/net/ixgbe/base/ixgbe_phy.h
index 7456bf4..ba5b308 100644
--- a/drivers/net/ixgbe/base/ixgbe_phy.h
+++ b/drivers/net/ixgbe/base/ixgbe_phy.h
@@ -83,9 +83,21 @@ POSSIBILITY OF SUCH DAMAGE.
#define IXGBE_I2C_EEPROM_STATUS_IN_PROGRESS 0x3
#define IXGBE_CS4227 0xBE /* CS4227 address */
+#define IXGBE_CS4227_GLOBAL_ID_LSB 0
+#define IXGBE_CS4227_SCRATCH 2
+#define IXGBE_CS4227_GLOBAL_ID_VALUE 0x03E5
+#define IXGBE_CS4227_SCRATCH_VALUE 0x5aa5
+#define IXGBE_CS4227_RETRIES 5
#define IXGBE_CS4227_SPARE24_LSB 0x12B0 /* Reg to program EDC */
#define IXGBE_CS4227_EDC_MODE_CX1 0x0002
#define IXGBE_CS4227_EDC_MODE_SR 0x0004
+#define IXGBE_CS4227_RESET_HOLD 500 /* microseconds */
+#define IXGBE_CS4227_RESET_DELAY 500 /* milliseconds */
+#define IXGBE_CS4227_CHECK_DELAY 30 /* milliseconds */
+#define IXGBE_PE 0xE0 /* Port expander address */
+#define IXGBE_PE_OUTPUT 1 /* Output register offset */
+#define IXGBE_PE_CONFIG 3 /* Config register offset */
+#define IXGBE_PE_BIT1 (1 << 1)
/* Flow control defines */
#define IXGBE_TAF_SYM_PAUSE 0x400
diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index 0ce1c85..c91e737 100644
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -38,6 +38,7 @@ POSSIBILITY OF SUCH DAMAGE.
#include "ixgbe_common.h"
#include "ixgbe_phy.h"
+
/**
* ixgbe_init_ops_X550 - Inits func ptrs and MAC type
* @hw: pointer to hardware structure
@@ -82,6 +83,187 @@ s32 ixgbe_init_ops_X550(struct ixgbe_hw *hw)
}
/**
+ * ixgbe_read_cs4227 - Read CS4227 register
+ * @hw: pointer to hardware structure
+ * @reg: register number to write
+ * @value: pointer to receive value read
+ *
+ * Returns status code
+ **/
+STATIC s32 ixgbe_read_cs4227(struct ixgbe_hw *hw, u16 reg, u16 *value)
+{
+ return ixgbe_read_i2c_combined_unlocked(hw, IXGBE_CS4227, reg, value);
+}
+
+/**
+ * ixgbe_write_cs4227 - Write CS4227 register
+ * @hw: pointer to hardware structure
+ * @reg: register number to write
+ * @value: value to write to register
+ *
+ * Returns status code
+ **/
+STATIC s32 ixgbe_write_cs4227(struct ixgbe_hw *hw, u16 reg, u16 value)
+{
+ return ixgbe_write_i2c_combined_unlocked(hw, IXGBE_CS4227, reg, value);
+}
+
+/**
+ * ixgbe_get_cs4227_status - Return CS4227 status
+ * @hw: pointer to hardware structure
+ *
+ * Returns error if CS4227 not successfully initialized
+ **/
+STATIC s32 ixgbe_get_cs4227_status(struct ixgbe_hw *hw)
+{
+ s32 status;
+ u16 value = 0;
+ u8 retry;
+
+ for (retry = 0; retry < IXGBE_CS4227_RETRIES; ++retry) {
+ status = ixgbe_read_cs4227(hw, IXGBE_CS4227_GLOBAL_ID_LSB,
+ &value);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ if (value == IXGBE_CS4227_GLOBAL_ID_VALUE)
+ break;
+ msec_delay(IXGBE_CS4227_CHECK_DELAY);
+ }
+ if (value != IXGBE_CS4227_GLOBAL_ID_VALUE)
+ return IXGBE_ERR_PHY;
+
+ status = ixgbe_write_cs4227(hw, IXGBE_CS4227_SCRATCH,
+ IXGBE_CS4227_SCRATCH_VALUE);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ status = ixgbe_read_cs4227(hw, IXGBE_CS4227_SCRATCH, &value);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ if (value != IXGBE_CS4227_SCRATCH_VALUE)
+ return IXGBE_ERR_PHY;
+ return IXGBE_SUCCESS;
+}
+
+/**
+ * ixgbe_read_pe - Read register from port expander
+ * @hw: pointer to hardware structure
+ * @reg: register number to read
+ * @value: pointer to receive read value
+ *
+ * Returns status code
+ **/
+STATIC s32 ixgbe_read_pe(struct ixgbe_hw *hw, u8 reg, u8 *value)
+{
+ s32 status;
+
+ status = ixgbe_read_i2c_byte_unlocked(hw, reg, IXGBE_PE, value);
+ if (status != IXGBE_SUCCESS)
+ ERROR_REPORT2(IXGBE_ERROR_CAUTION,
+ "port expander access failed with %d\n", status);
+ return status;
+}
+
+/**
+ * ixgbe_write_pe - Write register to port expander
+ * @hw: pointer to hardware structure
+ * @reg: register number to write
+ * @value: value to write
+ *
+ * Returns status code
+ **/
+STATIC s32 ixgbe_write_pe(struct ixgbe_hw *hw, u8 reg, u8 value)
+{
+ s32 status;
+
+ status = ixgbe_write_i2c_byte_unlocked(hw, reg, IXGBE_PE, value);
+ if (status != IXGBE_SUCCESS)
+ ERROR_REPORT2(IXGBE_ERROR_CAUTION,
+ "port expander access failed with %d\n", status);
+ return status;
+}
+
+/**
+ * ixgbe_reset_cs4227 - Reset CS4227 using port expander
+ * @hw: pointer to hardware structure
+ *
+ * Returns error code
+ **/
+STATIC s32 ixgbe_reset_cs4227(struct ixgbe_hw *hw)
+{
+ s32 status;
+ u8 reg;
+
+ status = ixgbe_read_pe(hw, IXGBE_PE_OUTPUT, ®);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ reg |= IXGBE_PE_BIT1;
+ status = ixgbe_write_pe(hw, IXGBE_PE_OUTPUT, reg);
+ if (status != IXGBE_SUCCESS)
+ return status;
+
+ status = ixgbe_read_pe(hw, IXGBE_PE_CONFIG, ®);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ reg &= ~IXGBE_PE_BIT1;
+ status = ixgbe_write_pe(hw, IXGBE_PE_CONFIG, reg);
+ if (status != IXGBE_SUCCESS)
+ return status;
+
+ status = ixgbe_read_pe(hw, IXGBE_PE_OUTPUT, ®);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ reg &= ~IXGBE_PE_BIT1;
+ status = ixgbe_write_pe(hw, IXGBE_PE_OUTPUT, reg);
+ if (status != IXGBE_SUCCESS)
+ return status;
+
+ usec_delay(IXGBE_CS4227_RESET_HOLD);
+
+ status = ixgbe_read_pe(hw, IXGBE_PE_OUTPUT, ®);
+ if (status != IXGBE_SUCCESS)
+ return status;
+ reg |= IXGBE_PE_BIT1;
+ status = ixgbe_write_pe(hw, IXGBE_PE_OUTPUT, reg);
+ if (status != IXGBE_SUCCESS)
+ return status;
+
+ msec_delay(IXGBE_CS4227_RESET_DELAY);
+
+ return IXGBE_SUCCESS;
+}
+
+/**
+ * ixgbe_check_cs4227 - Check CS4227 and reset as needed
+ * @hw: pointer to hardware structure
+ **/
+STATIC void ixgbe_check_cs4227(struct ixgbe_hw *hw)
+{
+ u32 swfw_mask = hw->phy.phy_semaphore_mask;
+ s32 status;
+ u8 retry;
+
+ for (retry = 0; retry < IXGBE_CS4227_RETRIES; retry++) {
+ status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
+ if (status != IXGBE_SUCCESS) {
+ ERROR_REPORT2(IXGBE_ERROR_CAUTION,
+ "semaphore failed with %d\n", status);
+ return;
+ }
+ status = ixgbe_get_cs4227_status(hw);
+ if (status == IXGBE_SUCCESS) {
+ hw->mac.ops.release_swfw_sync(hw, swfw_mask);
+ msec_delay(hw->eeprom.semaphore_delay);
+ return;
+ }
+ ixgbe_reset_cs4227(hw);
+ hw->mac.ops.release_swfw_sync(hw, swfw_mask);
+ msec_delay(hw->eeprom.semaphore_delay);
+ }
+ ERROR_REPORT2(IXGBE_ERROR_CAUTION,
+ "Unable to initialize CS4227, err=%d\n", status);
+}
+
+/**
* ixgbe_identify_phy_x550em - Get PHY type based on device id
* @hw: pointer to hardware structure
*
@@ -103,6 +285,8 @@ STATIC s32 ixgbe_identify_phy_x550em(struct ixgbe_hw *hw)
esdp &= ~(IXGBE_ESDP_SDP0_NATIVE | IXGBE_ESDP_SDP0_DIR);
IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
+ ixgbe_check_cs4227(hw);
+
return ixgbe_identify_module_generic(hw);
break;
case IXGBE_DEV_ID_X550EM_X_KX4:
--
1.9.3
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