diff options
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 966ab401e52..5e6468a7ca4 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -90,6 +90,7 @@ enum { board_ahci_mv = 4, board_ahci_sb700 = 5, board_ahci_mcp65 = 6, + board_ahci_nopmp = 7, /* global controller registers */ HOST_CAP = 0x00, /* host capabilities */ @@ -401,6 +402,14 @@ static const struct ata_port_info ahci_port_info[] = { .udma_mask = ATA_UDMA6, .port_ops = &ahci_ops, }, + /* board_ahci_nopmp */ + { + AHCI_HFLAGS (AHCI_HFLAG_NO_PMP), + .flags = AHCI_FLAG_COMMON, + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_ops, + }, }; static const struct pci_device_id ahci_pci_tbl[] = { @@ -525,9 +534,9 @@ static const struct pci_device_id ahci_pci_tbl[] = { { PCI_VDEVICE(NVIDIA, 0x0bc7), board_ahci }, /* MCP7B */ /* SiS */ - { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */ - { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */ - { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */ + { PCI_VDEVICE(SI, 0x1184), board_ahci_nopmp }, /* SiS 966 */ + { PCI_VDEVICE(SI, 0x1185), board_ahci_nopmp }, /* SiS 968 */ + { PCI_VDEVICE(SI, 0x0186), board_ahci_nopmp }, /* SiS 968 */ /* Marvell */ { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */ @@ -653,6 +662,14 @@ static void ahci_save_initial_config(struct pci_dev *pdev, cap &= ~HOST_CAP_PMP; } + if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361 && + port_map != 1) { + dev_printk(KERN_INFO, &pdev->dev, + "JMB361 has only one port, port_map 0x%x -> 0x%x\n", + port_map, 1); + port_map = 1; + } + /* * Temporary Marvell 6145 hack: PATA port presence * is asserted through the standard AHCI port @@ -1760,7 +1777,7 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance) struct ahci_host_priv *hpriv; unsigned int i, handled = 0; void __iomem *mmio; - u32 irq_stat, irq_ack = 0; + u32 irq_stat, irq_masked; VPRINTK("ENTER\n"); @@ -1769,16 +1786,17 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance) /* sigh. 0xffffffff is a valid return from h/w */ irq_stat = readl(mmio + HOST_IRQ_STAT); - irq_stat &= hpriv->port_map; if (!irq_stat) return IRQ_NONE; + irq_masked = irq_stat & hpriv->port_map; + spin_lock(&host->lock); for (i = 0; i < host->n_ports; i++) { struct ata_port *ap; - if (!(irq_stat & (1 << i))) + if (!(irq_masked & (1 << i))) continue; ap = host->ports[i]; @@ -1792,14 +1810,20 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance) "interrupt on disabled port %u\n", i); } - irq_ack |= (1 << i); - } - - if (irq_ack) { - writel(irq_ack, mmio + HOST_IRQ_STAT); handled = 1; } + /* HOST_IRQ_STAT behaves as level triggered latch meaning that + * it should be cleared after all the port events are cleared; + * otherwise, it will raise a spurious interrupt after each + * valid one. Please read section 10.6.2 of ahci 1.1 for more + * information. + * + * Also, use the unmasked value to clear interrupt as spurious + * pending event on a dummy port might cause screaming IRQ. + */ + writel(irq_stat, mmio + HOST_IRQ_STAT); + spin_unlock(&host->lock); VPRINTK("EXIT\n"); |