[PATCH] ata: pci: enable bus mastering
Christian Gmeiner
christian.gmeiner at gmail.com
Tue Apr 11 13:23:54 CEST 2023
The non DM code path already would enable pci bus mastering. Do the
same for the DM code path.
Fixes AHCI problems I am seeing on an Intel Apollolake device.
Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
drivers/ata/ahci.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 6998b82aa5..e80324e91a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1152,7 +1152,12 @@ int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
int ahci_probe_scsi_pci(struct udevice *ahci_dev)
{
ulong base;
- u16 vendor, device;
+ u16 vendor, device, cmd;
+
+ /* Enable bus mastering. */
+ dm_pci_read_config16(dev, PCI_COMMAND, &cmd);
+ cmd |= PCI_COMMAND_MASTER;
+ dm_pci_write_config16(dev, PCI_COMMAND, cmd);
base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5, 0, 0,
PCI_REGION_TYPE, PCI_REGION_MEM);
--
2.40.0
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