[Qemu-devel] [PATCH 2/7] pm_smbus: Add the ability to force block transfer enable

[minyard@acm.org]

From: Corey Minyard <cminyard@mvista.com>

The PIIX4 hardware has block transfer buffer always enabled in
the hardware, but the i801 does not.  Add a parameter to pm_smbus_init
to force on the block transfer so the PIIX4 handler can enable this
by default, as it was disabled by default before.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 hw/acpi/piix4.c           | 2 +-
 hw/i2c/pm_smbus.c         | 4 +++-
 hw/i2c/smbus_ich9.c       | 2 +-
 include/hw/i2c/pm_smbus.h | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 16abdf1..ab3af21 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -466,7 +466,7 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp)
     pci_conf[0x90] = s->smb_io_base | 1;
     pci_conf[0x91] = s->smb_io_base >> 8;
     pci_conf[0xd2] = 0x09;
-    pm_smbus_init(DEVICE(dev), &s->smb);
+    pm_smbus_init(DEVICE(dev), &s->smb, true);
     memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
     memory_region_add_subregion(pci_address_space_io(dev),
                                 s->smb_io_base, &s->smb.io);
diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c
index d8d1032..4b4c165 100644
--- a/hw/i2c/pm_smbus.c
+++ b/hw/i2c/pm_smbus.c
@@ -366,11 +366,13 @@ const VMStateDescription pmsmb_vmstate = {
     }
 };
 
-void pm_smbus_init(DeviceState *parent, PMSMBus *smb)
+void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk)
 {
     smb->op_done = true;
     smb->reset = pm_smbus_reset;
     smb->smbus = i2c_init_bus(parent, "i2c");
+    if (force_aux_blk)
+        smb->smb_auxctl |= AUX_BLK;
     memory_region_init_io(&smb->io, OBJECT(parent), &pm_smbus_ops, smb,
                           "pm-smbus", 64);
 }
diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c
index 8289cd1..4581cf6 100644
--- a/hw/i2c/smbus_ich9.c
+++ b/hw/i2c/smbus_ich9.c
@@ -90,7 +90,7 @@ static void ich9_smbus_realize(PCIDevice *d, Error **errp)
     pci_set_byte(d->config + ICH9_SMB_HOSTC, 0);
     /* TODO bar0, bar1: 64bit BAR support*/
 
-    pm_smbus_init(&d->qdev, &s->smb);
+    pm_smbus_init(&d->qdev, &s->smb, false);
     pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO,
                      &s->smb.io);
 }
diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h
index bfe740a..e64a206 100644
--- a/include/hw/i2c/pm_smbus.h
+++ b/include/hw/i2c/pm_smbus.h
@@ -32,7 +32,7 @@ typedef struct PMSMBus {
     bool op_done;
 } PMSMBus;
 
-void pm_smbus_init(DeviceState *parent, PMSMBus *smb);
+void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);
 
 extern const VMStateDescription pmsmb_vmstate;
 
-- 
2.7.4