From: Bartlomiej Zolnierkiewicz Date: Thu, 3 Dec 2009 19:32:10 +0000 (+0100) Subject: pata_it8213: fix PIO2 underclocking X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ed869ff0c70d482de0dc97c3138ff42cbf87aed5;p=linux-beck.git pata_it8213: fix PIO2 underclocking [ port of Sergei's fixes for pata_efar from commit 5f33b3b ] Fix the PIO mode 2 using mode 0 timings -- this driver should enable the fast timing bank starting with PIO2, just like the PIIX/ICH drivers do. Also, fix/rephrase some comments while at it. Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c index 092af531aa09..f0bf77ad371f 100644 --- a/drivers/ata/pata_it8213.c +++ b/drivers/ata/pata_it8213.c @@ -92,18 +92,17 @@ static void it8213_set_piomode (struct ata_port *ap, struct ata_device *adev) { 2, 1 }, { 2, 3 }, }; - if (pio > 2) - control |= 1; /* TIME1 enable */ + if (pio > 1) + control |= 1; /* TIME */ if (ata_pio_need_iordy(adev)) /* PIO 3/4 require IORDY */ - control |= 2; /* IORDY enable */ + control |= 2; /* IE */ /* Bit 2 is set for ATAPI on the IT8213 - reverse of ICH/PIIX */ if (adev->class != ATA_DEV_ATA) - control |= 4; + control |= 4; /* PPE */ pci_read_config_word(dev, idetm_port, &idetm_data); - /* Enable PPE, IE and TIME as appropriate */ - + /* Set PPE, IE, and TIME as appropriate */ if (adev->devno == 0) { idetm_data &= 0xCCF0; idetm_data |= control; @@ -122,7 +121,7 @@ static void it8213_set_piomode (struct ata_port *ap, struct ata_device *adev) pci_write_config_byte(dev, 0x44, slave_data); } - idetm_data |= 0x4000; /* Ensure SITRE is enabled */ + idetm_data |= 0x4000; /* Ensure SITRE is set */ pci_write_config_word(dev, idetm_port, idetm_data); }