Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=73946f9fc5be1433f1e182d11303188390ff242f
Commit:     73946f9fc5be1433f1e182d11303188390ff242f
Parent:     7f2803d0266844adacacbc3dea7822d5347ccb50
Author:     Alan Cox <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 5 22:53:38 2007 +0000
Committer:  Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Mon Nov 5 18:08:46 2007 -0500

    pata_hpt37x: Fix outstanding bug reports on the HPT374 and 37x cable detect
    
    - Read frequency correctly
    - Correct cable detect handling
    - Fix wrong filter test
    
    Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
    Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
 drivers/ata/pata_hpt37x.c |   49 +++++++++++++++++++++++++++++++++------------
 1 files changed, 36 insertions(+), 13 deletions(-)

diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index e61cb1f..3816b86 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -295,7 +295,7 @@ static unsigned long hpt370_filter(struct ata_device *adev, 
unsigned long mask)
 
 static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long 
mask)
 {
-       if (adev->class != ATA_DEV_ATA) {
+       if (adev->class == ATA_DEV_ATA) {
                if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
                        mask &= ~ (0x1F << ATA_SHIFT_UDMA);
        }
@@ -359,28 +359,25 @@ static int hpt374_pre_reset(struct ata_link *link, 
unsigned long deadline)
                { 0x50, 1, 0x04, 0x04 },
                { 0x54, 1, 0x04, 0x04 }
        };
-       u16 mcr3, mcr6;
+       u16 mcr3;
        u8 ata66;
        struct ata_port *ap = link->ap;
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+       unsigned int mcrbase = 0x50 + 4 * ap->port_no;
 
        if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
                return -ENOENT;
 
        /* Do the extra channel work */
-       pci_read_config_word(pdev, 0x52, &mcr3);
-       pci_read_config_word(pdev, 0x56, &mcr6);
+       pci_read_config_word(pdev, mcrbase + 2, &mcr3);
        /* Set bit 15 of 0x52 to enable TCBLID as input
-          Set bit 15 of 0x56 to enable FCBLID as input
         */
-       pci_write_config_word(pdev, 0x52, mcr3 | 0x8000);
-       pci_write_config_word(pdev, 0x56, mcr6 | 0x8000);
+       pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000);
        pci_read_config_byte(pdev, 0x5A, &ata66);
        /* Reset TCBLID/FCBLID to output */
        pci_write_config_word(pdev, 0x52, mcr3);
-       pci_write_config_word(pdev, 0x56, mcr6);
 
-       if (ata66 & (1 << ap->port_no))
+       if (ata66 & (2 >> ap->port_no))
                ap->cbl = ATA_CBL_PATA40;
        else
                ap->cbl = ATA_CBL_PATA80;
@@ -844,6 +841,25 @@ static int hpt37x_calibrate_dpll(struct pci_dev *dev)
        /* Never went stable */
        return 0;
 }
+
+static u32 hpt374_read_freq(struct pci_dev *pdev)
+{
+       u32 freq;
+       unsigned long io_base = pci_resource_start(pdev, 4);
+       if (PCI_FUNC(pdev->devfn) & 1) {
+               struct pci_dev *pdev_0 = pci_get_slot(pdev->bus, pdev->devfn - 
1);
+               /* Someone hot plugged the controller on us ? */
+               if (pdev_0 == NULL)
+                       return 0;
+               io_base = pci_resource_start(pdev_0, 4);
+               freq = inl(io_base + 0x90);
+               pci_dev_put(pdev_0);
+       }
+       else
+               freq = inl(io_base + 0x90);
+       return freq;
+}
+
 /**
  *     hpt37x_init_one         -       Initialise an HPT37X/302
  *     @dev: PCI device
@@ -902,7 +918,7 @@ static int hpt37x_init_one(struct pci_dev *dev, const 
struct pci_device_id *id)
                .flags = ATA_FLAG_SLAVE_POSS,
                .pio_mask = 0x1f,
                .mwdma_mask = 0x07,
-               .udma_mask = 0x0f,
+               .udma_mask = ATA_UDMA5,
                .port_ops = &hpt370_port_ops
        };
        /* HPT370A - UDMA100 */
@@ -911,7 +927,7 @@ static int hpt37x_init_one(struct pci_dev *dev, const 
struct pci_device_id *id)
                .flags = ATA_FLAG_SLAVE_POSS,
                .pio_mask = 0x1f,
                .mwdma_mask = 0x07,
-               .udma_mask = 0x0f,
+               .udma_mask = ATA_UDMA5,
                .port_ops = &hpt370a_port_ops
        };
        /* HPT371, 372 and friends - UDMA133 */
@@ -1047,9 +1063,16 @@ static int hpt37x_init_one(struct pci_dev *dev, const 
struct pci_device_id *id)
                outb(0x0e, iobase + 0x9c);
 
        /* Some devices do not let this value be accessed via PCI space
-          according to the old driver */
+          according to the old driver. In addition we must use the value
+          from FN 0 on the HPT374 */
+
+       if (chip_table == &hpt374) {
+               freq = hpt374_read_freq(dev);
+               if (freq == 0)
+                       return -ENODEV;
+       } else
+               freq = inl(iobase + 0x90);
 
-       freq = inl(iobase + 0x90);
        if ((freq >> 12) != 0xABCDE) {
                int i;
                u8 sr;
-
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