Hello.
On 01/04/2012 09:04 AM, Zhang, Sonic wrote:
The MULTI_DONE_INT, UDMAIN_DONE_INT and UDMAOUT_DONE_INT are triggered independent of the ATAPI_DEV_INT, although they bind to the same IRQ on bf548. With your patch, these interrupts are ignored and results in kernel error "unhandled IRQ".
If you insist the BMDMA emulation on bf548 should comply with INF-8038i. I would propose the following patch to disable all BF548 ATAPI specific interrupts.
Sonic
---
drivers/ata/pata_bf54x.c | 19 ++-----------------
1 files changed, 2 insertions(+), 17 deletions(-)
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
index bd987bb..9711c2a 100644
--- a/drivers/ata/pata_bf54x.c
+++ b/drivers/ata/pata_bf54x.c
@@ -418,14 +418,6 @@ static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
(tcyc_tdvs<<8 | tdvs));
ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
-
- /* Enable host ATAPI Untra DMA interrupts */
- ATAPI_SET_INT_MASK(base,
- ATAPI_GET_INT_MASK(base)
- | UDMAIN_DONE_MASK
- | UDMAOUT_DONE_MASK
- | UDMAIN_TERM_MASK
- | UDMAOUT_TERM_MASK);
}
}
}
@@ -470,10 +462,6 @@ static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
-
- /* Enable host ATAPI Multi DMA interrupts */
- ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
- | MULTI_DONE_MASK | MULTI_TERM_MASK);
SSYNC();
}
}
@@ -1155,13 +1143,10 @@ static unsigned char bfin_bmdma_status(struct ata_port *ap)
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
unsigned short int_status = ATAPI_GET_INT_STATUS(base);
- if (ATAPI_GET_STATUS(base)& (MULTI_XFER_ON|ULTRA_XFER_ON))
+ if (ATAPI_GET_STATUS(base)& (MULTI_XFER_ON | ULTRA_XFER_ON))
host_stat |= ATA_DMA_ACTIVE;
- if (int_status& (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT|
- ATAPI_DEV_INT))
+ if (ATAPI_GET_INT_STATUS(base)& ATAPI_DEV_INT)
host_stat |= ATA_DMA_INTR;
- if (int_status& (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT))
- host_stat |= ATA_DMA_ERR|ATA_DMA_INTR;
dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat);
Unfortunately your patch is white space damaged, with tabs converted to
spaces. I'll reconstruct it...
MBR, Sergei
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