e1000: Add EEPROM access locking for i210
As per datasheet (section 4.6 p. 147) accessing EEPROM on i210 requires software to hold a corresponding lock bit in SW_FW_SYNC register. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -15,7 +15,8 @@ static int32_t e1000_read_eeprom_eerd(struct e1000_hw *hw, uint16_t offset,
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uint16_t words, uint16_t *data);
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static int32_t e1000_spi_eeprom_ready(struct e1000_hw *hw);
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static void e1000_release_eeprom(struct e1000_hw *hw);
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static int32_t e1000_acquire_eeprom_flash(struct e1000_hw *hw);
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static void e1000_release_eeprom_flash(struct e1000_hw *hw);
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/******************************************************************************
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@ -289,6 +290,11 @@ static int32_t e1000_acquire_eeprom_microwire(struct e1000_hw *hw)
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return E1000_SUCCESS;
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}
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static int32_t e1000_acquire_eeprom_flash(struct e1000_hw *hw)
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{
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return e1000_swfw_sync_acquire(hw, E1000_SWFW_EEP_SM);
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}
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static int32_t e1000_acquire_eeprom(struct e1000_hw *hw)
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{
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if (hw->eeprom.acquire)
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@ -402,6 +408,9 @@ int32_t e1000_init_eeprom_params(struct e1000_hw *hw)
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if (eecd & E1000_EECD_I210_FLASH_DETECTED) {
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eeprom->type = e1000_eeprom_flash;
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eeprom->word_size = 2048;
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eeprom->acquire = e1000_acquire_eeprom_flash;
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eeprom->release = e1000_release_eeprom_flash;
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} else {
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eeprom->type = e1000_eeprom_invm;
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}
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@ -620,6 +629,14 @@ static void e1000_release_eeprom_spi(struct e1000_hw *hw)
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e1000_release_eeprom_spi_microwire_epilogue(hw);
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}
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static void e1000_release_eeprom_flash(struct e1000_hw *hw)
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{
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if (e1000_swfw_sync_release(hw, E1000_SWFW_EEP_SM) < 0)
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dev_warn(hw->dev,
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"Timeout while releasing SWFW_SYNC bits (0x%08x)\n",
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E1000_SWFW_EEP_SM);
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}
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static void e1000_release_eeprom(struct e1000_hw *hw)
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{
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if (hw->eeprom.release)
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