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V4L/DVB: ngene: Implement support for MSI

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Add MSI support, may be enabled with firmware version 18.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Oliver Endriss 2010-05-16 05:29:14 -03:00 committed by Mauro Carvalho Chehab
parent eb05d155bc
commit 4387418129
2 changed files with 34 additions and 1 deletions
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33
drivers/media/dvb/ngene/ngene-core.c
View file

@ -1299,11 +1299,14 @@ static void ngene_stop(struct ngene *dev)
ngwritel(0, NGENE_EVENT);
ngwritel(0, NGENE_EVENT_HI);
free_irq(dev->pci_dev->irq, dev);
if (dev->msi_enabled)
pci_disable_msi(dev->pci_dev);
}
static int ngene_start(struct ngene *dev)
{
int stat;
unsigned long flags;
int i;
pci_set_master(dev->pci_dev);
@ -1333,6 +1336,28 @@ static int ngene_start(struct ngene *dev)
if (stat < 0)
goto fail;
#ifdef CONFIG_PCI_MSI
/* enable MSI if kernel and card support it */
if (dev->card_info->msi_supported) {
ngwritel(0, NGENE_INT_ENABLE);
free_irq(dev->pci_dev->irq, dev);
stat = pci_enable_msi(dev->pci_dev);
if (stat) {
printk(KERN_INFO DEVICE_NAME
": MSI not available\n");
flags = IRQF_SHARED;
} else {
flags = 0;
dev->msi_enabled = true;
}
stat = request_irq(dev->pci_dev->irq, irq_handler,
flags, "nGene", dev);
if (stat < 0)
goto fail2;
ngwritel(1, NGENE_INT_ENABLE);
}
#endif
stat = ngene_i2c_init(dev, 0);
if (stat < 0)
goto fail;
@ -1358,10 +1383,16 @@ static int ngene_start(struct ngene *dev)
bconf = BUFFER_CONFIG_3333;
stat = ngene_command_config_buf(dev, bconf);
}
return stat;
if (!stat)
return stat;
/* otherwise error: fall through */
fail:
ngwritel(0, NGENE_INT_ENABLE);
free_irq(dev->pci_dev->irq, dev);
fail2:
if (dev->msi_enabled)
pci_disable_msi(dev->pci_dev);
return stat;
}

2
drivers/media/dvb/ngene/ngene.h
View file

@ -725,6 +725,7 @@ struct ngene {
u32 device_version;
u32 fw_interface_version;
u32 icounts;
bool msi_enabled;
u8 *CmdDoneByte;
int BootFirmware;
@ -797,6 +798,7 @@ struct ngene_info {
#define NGENE_VBOX_V2 7
int fw_version;
bool msi_supported;
char *name;
int io_type[MAX_STREAM];