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authorLinus Torvalds <torvalds@linux-foundation.org>2010-06-07 17:09:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-06-07 17:09:03 -0700
commit4d3d769c605ebdf9fbb5a9d63827598b48351861 (patch)
treeb71d8faa40a026b2ed68a24ab25ccfd514cf45f3 /drivers
parentcfca31ce789963c0dd6ca2e9cc13b90cc2802fbd (diff)
parent0ee719527229fa86ace8e3abccae3c2a8bbfd6db (diff)
downloadlinux-4d3d769c605ebdf9fbb5a9d63827598b48351861.tar.bz2
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: ahci: redo stopping DMA engines on empty ports sata_sil24: fix kernel panic on ARM caused by unaligned access in sata_sil24 ahci: add pci quirk for JMB362 sata_via: explain the magic fix
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libahci.c21
-rw-r--r--drivers/ata/sata_sil24.c12
-rw-r--r--drivers/ata/sata_via.c18
-rw-r--r--drivers/pci/quirks.c5
4 files changed, 29 insertions, 27 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 1984a6e89e84..261f86d102e8 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -541,29 +541,11 @@ static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
return -EINVAL;
}
-static int ahci_is_device_present(void __iomem *port_mmio)
-{
- u8 status = readl(port_mmio + PORT_TFDATA) & 0xff;
-
- /* Make sure PxTFD.STS.BSY and PxTFD.STS.DRQ are 0 */
- if (status & (ATA_BUSY | ATA_DRQ))
- return 0;
-
- /* Make sure PxSSTS.DET is 3h */
- status = readl(port_mmio + PORT_SCR_STAT) & 0xf;
- if (status != 3)
- return 0;
- return 1;
-}
-
void ahci_start_engine(struct ata_port *ap)
{
void __iomem *port_mmio = ahci_port_base(ap);
u32 tmp;
- if (!ahci_is_device_present(port_mmio))
- return;
-
/* start DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_START;
@@ -1892,6 +1874,9 @@ static void ahci_error_handler(struct ata_port *ap)
}
sata_pmp_error_handler(ap);
+
+ if (!ata_dev_enabled(ap->link.device))
+ ahci_stop_engine(ap);
}
static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e9250514734b..70b58fe9e5b1 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -539,12 +539,12 @@ static void sil24_config_port(struct ata_port *ap)
writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
/* zero error counters. */
- writel(0x8000, port + PORT_DECODE_ERR_THRESH);
- writel(0x8000, port + PORT_CRC_ERR_THRESH);
- writel(0x8000, port + PORT_HSHK_ERR_THRESH);
- writel(0x0000, port + PORT_DECODE_ERR_CNT);
- writel(0x0000, port + PORT_CRC_ERR_CNT);
- writel(0x0000, port + PORT_HSHK_ERR_CNT);
+ writew(0x8000, port + PORT_DECODE_ERR_THRESH);
+ writew(0x8000, port + PORT_CRC_ERR_THRESH);
+ writew(0x8000, port + PORT_HSHK_ERR_THRESH);
+ writew(0x0000, port + PORT_DECODE_ERR_CNT);
+ writew(0x0000, port + PORT_CRC_ERR_CNT);
+ writew(0x0000, port + PORT_HSHK_ERR_CNT);
/* always use 64bit activation */
writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 0ecd0f6aa2c0..4730c42a5ee5 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -578,10 +578,24 @@ static void svia_configure(struct pci_dev *pdev)
/*
* vt6421 has problems talking to some drives. The following
- * is the magic fix from Joseph Chan <JosephChan@via.com.tw>.
- * Please add proper documentation if possible.
+ * is the fix from Joseph Chan <JosephChan@via.com.tw>.
+ *
+ * When host issues HOLD, device may send up to 20DW of data
+ * before acknowledging it with HOLDA and the host should be
+ * able to buffer them in FIFO. Unfortunately, some WD drives
+ * send upto 40DW before acknowledging HOLD and, in the
+ * default configuration, this ends up overflowing vt6421's
+ * FIFO, making the controller abort the transaction with
+ * R_ERR.
+ *
+ * Rx52[2] is the internal 128DW FIFO Flow control watermark
+ * adjusting mechanism enable bit and the default value 0
+ * means host will issue HOLD to device when the left FIFO
+ * size goes below 32DW. Setting it to 1 makes the watermark
+ * 64DW.
*
* https://bugzilla.kernel.org/show_bug.cgi?id=15173
+ * http://article.gmane.org/gmane.linux.ide/46352
*/
if (pdev->device == 0x3249) {
pci_read_config_byte(pdev, 0x52, &tmp8);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b7512cf08c58..477345d41641 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1457,7 +1457,8 @@ static void quirk_jmicron_ata(struct pci_dev *pdev)
conf5 &= ~(1 << 24); /* Clear bit 24 */
switch (pdev->device) {
- case PCI_DEVICE_ID_JMICRON_JMB360:
+ case PCI_DEVICE_ID_JMICRON_JMB360: /* SATA single port */
+ case PCI_DEVICE_ID_JMICRON_JMB362: /* SATA dual ports */
/* The controller should be in single function ahci mode */
conf1 |= 0x0002A100; /* Set 8, 13, 15, 17 */
break;
@@ -1493,12 +1494,14 @@ static void quirk_jmicron_ata(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
+DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);