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Commit 2f957fc9 authored by Xulei's avatar Xulei Committed by Kumar Gala
Browse files

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: default avatarLei Xu <B33228@freescale.com>
Signed-off-by: default avatarRoy Zang <tie-fei.zang@freescale.com>
Acked-by: default avatarJeff Garzik <jgarzik@redhat.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent d1dcfbbb

drivers/ata/sata_fsl.c

+18 −7
Original line number Diff line number Diff line
@@ -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",

	},

	{},

};