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ATA: Add FSL sata v2 controller support

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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>
This commit is contained in:
Xulei 2011-01-19 17:07:29 +08:00 committed by Kumar Gala
parent d1dcfbbb9f
commit 2f957fc959
1 changed files with 18 additions and 7 deletions
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25
drivers/ata/sata_fsl.c
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@ -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",
},
{},
};