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drivers: espi: xec: Fix OOB transaction failure when perform back-to-back

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Enable OOB Rx interrupt only when required.

Signed-off-by: Jose Alberto Meza <jose.a.meza.arellano@intel.com>
This commit is contained in:
Jose Alberto Meza 2020-07-22 13:50:25 -07:00 • committed by Anas Nashif
commit f4cbec8924
1 changed files with 7 additions and 1 deletions
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8
drivers/espi/espi_mchp_xec.c
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@ -531,6 +531,10 @@ static int espi_xec_receive_oob(struct device *dev,
return -EIO;
}
/* Enable Rx only when we want to receive data */
ESPI_OOB_REGS->RX_IEN |= MCHP_ESPI_OOB_RX_IEN;
ESPI_OOB_REGS->RX_CTRL |= MCHP_ESPI_OOB_RX_CTRL_AVAIL;
/* Wait until ISR or timeout */
ret = k_sem_take(&data->rx_lock, K_MSEC(MAX_OOB_TIMEOUT));
if (ret == -EAGAIN) {
@ -685,7 +689,6 @@ static void espi_init_oob(struct device *dev)
ESPI_OOB_REGS->TX_ADDR_LSW = (uint32_t)&slave_tx_mem[0];
ESPI_OOB_REGS->RX_ADDR_LSW = (uint32_t)&slave_rx_mem[0];
ESPI_OOB_REGS->RX_LEN = 0x00FF0000;
ESPI_OOB_REGS->RX_CTRL |= MCHP_ESPI_OOB_RX_CTRL_AVAIL;
/* Enable OOB Tx channel enable change status interrupt */
ESPI_OOB_REGS->TX_IEN |= MCHP_ESPI_OOB_TX_IEN_CHG_EN;
@ -893,6 +896,9 @@ static void espi_oob_down_isr(struct device *dev)
/* Register is write-on-clear, ensure only 1 bit is affected */
ESPI_OOB_REGS->RX_STS = MCHP_ESPI_OOB_RX_STS_DONE;
/* Disable Rx interrupt */
ESPI_OOB_REGS->RX_IEN &= ~MCHP_ESPI_OOB_RX_IEN;
k_sem_give(&data->rx_lock);
}
}