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X-Received-From: 2a00:1450:4864:20::42f Subject: [Qemu-devel] [PULL 66/74] i2c: pm_smbus: Add interrupt handling X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Corey Minyard , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDMRC_1 RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Corey Minyard Add the necessary code so that interrupts actually work from the pm_smbus device. Signed-off-by: Corey Minyard Cc: Michael S. Tsirkin Cc: Paolo Bonzini Message-Id: <1534796770-10295-7-git-send-email-minyard@acm.org> Signed-off-by: Paolo Bonzini --- hw/i2c/pm_smbus.c | 14 +++++++++++++- hw/i2c/smbus_ich9.c | 16 ++++++++++++++++ include/hw/i2c/pm_smbus.h | 2 ++ 3 files changed, 31 insertions(+), 1 deletion(-) diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c index 32132be..6322f07 100644 --- a/hw/i2c/pm_smbus.c +++ b/hw/i2c/pm_smbus.c @@ -214,6 +214,12 @@ static void smb_transaction_start(PMSMBus *s) s->smb_stat |=3D STS_HOST_BUSY; } =20 +static bool +smb_irq_value(PMSMBus *s) +{ + return ((s->smb_stat & ~STS_HOST_BUSY) !=3D 0) && (s->smb_ctl & CTL_IN= TREN); +} + static void smb_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, unsigned width) { @@ -309,7 +315,9 @@ static void smb_ioport_writeb(void *opaque, hwaddr addr= , uint64_t val, } =20 out: - return; + if (s->set_irq) { + s->set_irq(s, smb_irq_value(s)); + } } =20 static uint64_t smb_ioport_readb(void *opaque, hwaddr addr, unsigned width) @@ -365,6 +373,10 @@ static uint64_t smb_ioport_readb(void *opaque, hwaddr = addr, unsigned width) SMBUS_DPRINTF("SMB readb port=3D0x%04" HWADDR_PRIx " val=3D0x%02x\n", addr, val); =20 + if (s->set_irq) { + s->set_irq(s, smb_irq_value(s)); + } + return val; } =20 diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c index a66a114..522a703 100644 --- a/hw/i2c/smbus_ich9.c +++ b/hw/i2c/smbus_ich9.c @@ -40,6 +40,8 @@ typedef struct ICH9SMBState { PCIDevice dev; =20 + bool irq_enabled; + PMSMBus smb; } ICH9SMBState; =20 @@ -109,11 +111,25 @@ static void ich9_smb_class_init(ObjectClass *klass, v= oid *data) dc->user_creatable =3D false; } =20 +static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled) +{ + ICH9SMBState *s =3D pmsmb->opaque; + + if (enabled =3D=3D s->irq_enabled) { + return; + } + + s->irq_enabled =3D enabled; + pci_set_irq(&s->dev, enabled); +} + I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) { PCIDevice *d =3D pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DE= VICE); ICH9SMBState *s =3D ICH9_SMB_DEVICE(d); + s->smb.set_irq =3D ich9_smb_set_irq; + s->smb.opaque =3D s; return s->smb.smbus; } =20 diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h index 99d5489..1afa3cf 100644 --- a/include/hw/i2c/pm_smbus.h +++ b/include/hw/i2c/pm_smbus.h @@ -23,6 +23,8 @@ typedef struct PMSMBus { =20 /* Set by the user. */ bool i2c_enable; + void (*set_irq)(struct PMSMBus *s, bool enabled); + void *opaque; =20 /* Internally used by pm_smbus. */ =20 --=20 1.8.3.1