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authorXulei <B33228@freescale.com>2011-01-19 17:07:29 +0800
committerKumar Gala <galak@kernel.crashing.org>2011-03-15 10:39:16 -0500
commit2f957fc9595b5baaae7b5a3dc8c83b3a9950a39e (patch)
treea965a81eee26d6e0dee55fd0805b3b1dbd0910bf /drivers/ata
parentd1dcfbbb9f57a1f380e824caddc2c77b48a3a96b (diff)
downloadlinux-2f957fc9595b5baaae7b5a3dc8c83b3a9950a39e.tar.bz2
ATA: Add FSL sata v2 controller support
In FSL sata v2 block, the snoop bit of PRDT Word3 description information is at bit28 instead of bit22. This patch adds FSL sata v2 probe and resolve this difference. Signed-off-by: Lei Xu <B33228@freescale.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_fsl.c25
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index b0214d00d50b..01a5400bd7c5 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -6,7 +6,7 @@
* Author: Ashish Kalra <ashish.kalra@freescale.com>
* Li Yang <leoli@freescale.com>
*
- * Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2006-2007, 2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -158,7 +158,8 @@ enum {
IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
- DATA_SNOOP_ENABLE = (1 << 22),
+ DATA_SNOOP_ENABLE_V1 = (1 << 22),
+ DATA_SNOOP_ENABLE_V2 = (1 << 28),
};
/*
@@ -256,6 +257,7 @@ struct sata_fsl_host_priv {
void __iomem *ssr_base;
void __iomem *csr_base;
int irq;
+ int data_snoop;
};
static inline unsigned int sata_fsl_tag(unsigned int tag,
@@ -308,7 +310,8 @@ static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
}
static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
- u32 *ttl, dma_addr_t cmd_desc_paddr)
+ u32 *ttl, dma_addr_t cmd_desc_paddr,
+ int data_snoop)
{
struct scatterlist *sg;
unsigned int num_prde = 0;
@@ -358,8 +361,7 @@ static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
ttl_dwords += sg_len;
prd->dba = cpu_to_le32(sg_addr);
- prd->ddc_and_ext =
- cpu_to_le32(DATA_SNOOP_ENABLE | (sg_len & ~0x03));
+ prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03));
VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
ttl_dwords, prd->dba, prd->ddc_and_ext);
@@ -374,7 +376,7 @@ static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
/* set indirect extension flag along with indirect ext. size */
prd_ptr_to_indirect_ext->ddc_and_ext =
cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
- DATA_SNOOP_ENABLE |
+ data_snoop |
(indirect_ext_segment_sz & ~0x03)));
}
@@ -417,7 +419,8 @@ static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
if (qc->flags & ATA_QCFLAG_DMAMAP)
num_prde = sata_fsl_fill_sg(qc, (void *)cd,
- &ttl_dwords, cd_paddr);
+ &ttl_dwords, cd_paddr,
+ host_priv->data_snoop);
if (qc->tf.protocol == ATA_PROT_NCQ)
desc_info |= FPDMA_QUEUED_CMD;
@@ -1336,6 +1339,11 @@ static int sata_fsl_probe(struct platform_device *ofdev,
}
host_priv->irq = irq;
+ if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2"))
+ host_priv->data_snoop = DATA_SNOOP_ENABLE_V2;
+ else
+ host_priv->data_snoop = DATA_SNOOP_ENABLE_V1;
+
/* allocate host structure */
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
@@ -1418,6 +1426,9 @@ static struct of_device_id fsl_sata_match[] = {
{
.compatible = "fsl,pq-sata",
},
+ {
+ .compatible = "fsl,pq-sata-v2",
+ },
{},
};